From DLsite:

Chapter 1: "With some practice, you might get used to it."

That's what his friends said after asking him whether he was a top or a bottom.
He tries to deny both, but quickly finds himself the meat in a man sandwich!

[Characters]
Yori
A serious but slightly tsundere honor student. He's a virgin who's never dated anybody.
His parents tend to not be around, making him a bit lonely.

Souichi (Top)
A strong and silent tough guy. He often reads erotic novels without changing his facial expression.
His hobby is observing Yori.

Yumeto (Bottom)
A playboy with a big personality. He hasn't had sex since he realized he likes Yori.
He likes to try new things in bed.

Chapter 2: It's been weeks since Yori started up a sexual relationship with his childhood friends. And he's still not sure if he wants that piercing... A sweet new threesome begins!

Chapter 3: In the summer, the three of them went for their first-ever vacation alone together. Changing things up from their daily lives has left them a little out of sorts, but also open to new experiences...

Note: Originally self-published as 3 individual chapters, then eventually released as 1 volume with new content by Shinshokan.

English Translations: (For the 3 Chapters only)
INKR
Coolmic: Chapter 1, Chapter 2, Chapter 3