I can't get enough of this mom's ass in tight pants.

I am Waka Takamura. I have a younger brother who is seven years younger than me. His name is Kei. Although we are quite far apart in age, we get along very well.

My mother died when I was in junior high school, and since then I have been like a mother to Kei. I had to do housework while going to school, so I was very busy, but Kei was a kind and helpful boy who often helped me.

Kei often wrote letters to our late mother. I remember Kei hugging my mother from behind when she was in the kitchen. I often saw my mother working in the kitchen wearing an apron while Kei buried his face in her buttocks.

Seeing him like that, I thought Kei must have really loved our mother. I don't remember exactly when it started, but I began to notice something unusual about Kei.

Kei seemed to have an abnormal fascination with women's buttocks. Both my late mother and I had rather large ones.

He wasn't just interested in my mother's and my own; I noticed that his eyes were often drawn to other women's as well.

One day I asked him directly:

"Kei-chan, do you like women's asses?"

"Sis, what are you talking about..." he said in a panic.

Considering the way he dodged the question, I think it was probably true.

Kei also seems to have a preference for older women. Maybe this is because he lost his beloved mother at a young age.

Kei has a handsome face and is popular with girls, but whenever his classmates or younger girls try to get close to him, it never works out.

There's no doubt about it. Kei prefers older women.

It seems like he's still a virgin. I wish he would date a girl his own age and move on, but that doesn't seem to be what Kei wants. He's strangely strict about such things, and I don't know who he takes after.

When I got married and moved out of our parents' house, Kei found himself in a situation where he could invite women over without anyone complaining.

Our father works overseas and rarely comes home, so Kei enjoys living alone. But even after he became a college student, he never seemed to have a girlfriend.

He's not very good at household chores like cooking, cleaning, or doing laundry, and I always felt frustrated thinking that he should find a girl to help him out.

Then one day...

I received a phone call from a senior who had been very kind to me in high school.

"Hello, Waka-chan? It's been a long time. How are you?"

"Oh, Ayaka-senpai. It's been a while! Yes, I'm fine..."

After exchanging some updates about our lives, Ayaka-senpai said:

"Come to think of it, Waka-chan, sometimes I see a guy who looks just like you."

"Haha, I see. You must have seen my younger brother. He's currently studying at a university in Tokyo. He looks very much like me, so people who know us would recognize him right away."

While we were chatting about trivial things, my mind wandered to a secret I knew about Ayaka-senpai.

It was a few years ago...

That afternoon, I had to run some errands in a certain downtown area. It wasn't the safest place and had an atmosphere that made me feel uncomfortable at night.

When I finished my errands and was walking quickly to go home, I heard loud voices coming from an alley.

"Who did you refuse to sell to? This is our territory. If you step out of line, there will be consequences..."

There were five or six women, all heavily made up and dressed provocatively. I could tell at a glance that they were involved in something shady. I tried to avoid them and walk by when...

"The women are fighting! Oh no, the police are here! Officers, come here!"

A loud voice shouted, and the women quickly dispersed. One of them, who had been with the group, suddenly came toward me and slipped past.

When I saw her, I was astonished. I recognized her immediately.

...Huh? Ayaka-senpai?

She was wearing heavy makeup, a low-cut blouse, and a skirt so short that her underwear was almost visible. It was definitely Ayaka-senpai, and her walk was unmistakable.

Ayaka-senpai, what were you doing there?

I stood there in a daze and watched her go.