Shindou-kun is a Handful: Coping with a Junior Who's Too Sexually Explicit!

[MangaDex]

 

[Coldlight]

Rinko looks like an older version of the girl from Chiguhagu Kanojo (NSFW), one of this mangaka's other works. They're probably different characters, but the eyes, eyebrows, hair color and part of the hair look rather close.

 

[Pubgay]

As someone who enjoys plots build up often more than the echi scenes, it was great