Which One...? A Beautiful Senpai? Or a Determined Childhood Friend?

One day, I got called by my senior "Kaede Amemiya" to the art club room, where I ended up nude modeling for her.

But no matter how many times I tell myself it's just for sketching purposes, I just can't stay still when I'm being intently looked at by the senior I have a crush on.
Just when I was thinking of that...

"As thanks for your help, allow me...?"
...and I finally crossed a line with my senior in the club, Amemiya-senpai.

However, what uncanny timing.
While my head was confused and lost in bliss, my childhood friend "Arisa Kutou" arrived at the club room and events began developing rapidly.

"I've loved you for a long, long time, way before Amemiya-senpai did...!"
I received an unlikely confession; and what's more it's from my childhood friend, who I found myself crossing the line with; and so my harem sex life begins...

(Source: FANZA, translated)

Note: Originally released as a doujinshi with mosaic censorship, later published by No.9 with full censorship. A live-action AV adaptation (CAWD-156) was released on December 25th, 2020.