1. Awakening passions with my twin sister

I’m so messed up.

I am one of three siblings, and while there is ten years between me and my younger brother, my younger sister and I are in the same grade. That is, we are fraternal twins.

If I am honest with myself, I can be quite sensitive and overthink things, however in comparison (and perhaps complementary, as is the way with twins) my sister is quite calm and easygoing. My parents say they wish it was the other way around, and I can understand that.

My sister and I are both first year university students. We ended up deciding to go to the same university, so my parents have to pay the tuition fee for both of us. Being the parents of twins isn’t easy, I guess.

My problem started when I was in the third year of high school.

When we were little, we were told we looked really similar. We used to take baths together even until we entered junior high school, and even though we got along really well, naturally our parents weren’t too happy with the idea we might continue. However, when we became junior high school students, we became busy with club activities and we naturally stopped because our schedules didn’t align.

So from that point on we stopped taking baths together, and my sister really discovered boys and found one she particularly liked. I knew him. He was nice enough, but not that cool, and I thought it was a little strange that she would fall in love with that kind of guy.

When it came time to go on to high school, I went on to a local high school, and my sister went on to a girls’ high school. Without a specific intention to, we were both going along our own separate paths. I worked hard at school and club activities, but occasionally I peeked when my sister was in the bath.

My younger twin sister had become a high school student, no longer had the childlike air she did when she was in junior high school. Because we are a family we live together, but sometimes when I catch a glimpse of my sister from certain angles I am suddenly reminded of her femininity. I even masturbate while thinking about her and to those memories of her naked body when I looked into the bath.

One day, I wanted to borrow an eraser and I opened the door of her room without knocking.

“Jeez, big bro! What do you want so suddenly?”

She was standing there turned away from me, clutching her pajama pants to her naked chest.

“Oh, I’m sorry. Were you changing?”

“Can you get out?”

“Okay, sorry. I just wanted to borrow an eraser.”

“In the desk. Take it and get out.”

“Thanks. Sorry for barging in on you while you were changing.”

She huffed and after I closed the door I heard the lock click shut.

I returned to my room, replaying the memory in my mind. As she’d heard the door open, my twin had turned away and covered her chest, but I had clearly seen the side of her breast. It was somewhat small, but I still wanted to feel it. Her pink bra was lying on the desk next to her and she was wearing matching lace panties which I thought was devastatingly lewd. Whilst she’d been turned away from me I had seen the smooth fall of her shoulders to the sensuous curve of her lower back, her skin smooth and beautiful and not an ounce of extra fat anywhere. If this were a dream world I would have pushed her down and embraced her. If this were a dream world.

After that, I often ‘accidentally’ walked in on her in the bathroom, or when she was changing in her room. Being able to see a naked girl the same age as my classmates is a privilege of being born a twin. As a typical high school boy, after seeing my sister naked, I would invariably return to my room and masturbate.

Of course, it soon became time for the university entrance exams and the day of judgment was drawing near. Exam cramming was more stressful and anxiety inducing than I had expected. My friend had given me a porn magazine to help with ‘stress relief’, but I had used it so often it couldn’t even make me half-hard. That wasn’t a problem though, because my sweet twin sister was always nearby, and I could peep on her in the bath or walk in on her when she was changing and gather plenty of masturbation material.

However, in relying solely on that as a source of stimulation, my feelings for my sister gradually grew stronger. I fantasized about touching her breasts, what it would be like to have her suck my dick, and how it would feel to hold her in my arms.

And then the day came.

My sister was dumped by the guy she liked.

Instead of studying for her exams, my easygoing twin shut herself in her room. I couldn’t bear to see my sister feeling that sad, so before bed I went to her room to try and cheer her up. This time I didn’t walk in on her. I knocked on her door.

“What?” came the soft reply.

“It’s me. Can I have a minute?”

“ ... okay.”

I opened the door slowly. She was sitting on her futon. Her hair was a mess.

“Why did you knock?” she asked quietly.

“I didn’t want to walk in on you if you were, you know ... changing or something.”

“Hasn’t stopped you before,” she said in an odd voice. She sighed. “What do you want?”

“Well you aren’t really that happy at the moment, huh. If you want, you can talk to me.”

“Yeah, but...”

“We’re twins, right? So I’ll understand.” Suddenly she burst into tears. I sat down beside her and put my arm around her shoulders. “Hey, don’t cry. That guy’s not worth any of this.”

“Enough,” she said. There was an odd silence, and then she laughed. “That’s enough. Good night.”

I left her room. I think I miscalculated. In an erotic novel, we would have kissed, she would have laid down, unbuttoning her pajamas ... However, this is not the case in reality.

I am stuck in my fantasy world?

After I returned to my room, I fell asleep whilst analyzing and replaying those events over and over again.

A few days later, my parents and younger brother went on a trip. Apparently our mother won a supermarket prize for a hot spring trip, but it had to be during the week.

Our parents were pretty cool about taking a mid-week break, but we twins were worried because our university entrance exam was coming up. So despite the awkwardness between us (which apparently only we were aware of), we stayed behind.

When I got home from school, my sister was preparing dinner. Even though she was still in high school, she often helped our mother in the kitchen and had become quite good at cooking. So naturally she cooks exactly the same as our mother.

So after we ate we tidied up and watched TV. When it was almost nine o’clock, I decided to have my bath.

Today I am alone with my sister.

My dick hasn’t gone down since I got home.

When I was relaxing in the bathtub, my sister came to the dressing room outside, opened the door to the bathroom and put her head inside.

“Hey, big brother. It’s been ages since we had a bath together. Can I come in?”

“Are you serious? Like, if you want.” I tried to be cool.

My sister closed the door to the dressing room and started to remove her clothes. I could clearly see my sister undressing through the frosted glass. I could clearly see the color of her panties.

Light blue.

My heart was pounding. I slipped the bathing towel that was resting on my head down into my lap, to cover my straining dick.

She opened the door and came in with a bathing towel covering her breasts and lower body.

“I can still see everything, even if you’re trying to cover up.”

“Don’t stare! It’s embarrassing,” she shot back.

My sister was naked in front of me. My crotch was definitely aware, big, hard, and pulsating. When she poured hot water over her body, the towel stuck to her slim form, the shape of her breasts and nipples became clearly visible.

“What?” She looked at me.

“You’ve grown up.”

“You’re thinking something perverted, aren’t you.” Her eyes flashed.

“No. We’re twins,” I replied.

“Your eyes are lying.”

“Don’t be silly. It’s not like that,” I scoffed.

“Okay. Then let me check.”

“Huh? What?”

“What are you hiding with that towel?”

“Nothing.”

“Looking your little sister naked has turned you into a pervert, hasn’t it?

As my sister entered the bathtub she tried to snatch the towel I was using to cover myself, but as we grappled her towel fell down and she was completely exposed to me.

“Wow! Your tits are big!” I exclaimed.

“It’s not the only thing that’s gotten big,” she huffed, pulling the towel. “Show me!”

I decided. Today was the day. I let my lust overtake my reason and allowed her to snatch the towel from me. As soon as she had the towel, her eyes got wide.