Intelligent and beautiful female high schooler Reika Sawatari and handsome and astute male high schooler Subaru Emura, both of whom with a certain fetish that nobody knows, have started their relationship after a certain event.
S Watari-san to M Mura-kun is a completed manga by Hideki. It blends romance. You can read all 18 available chapters of S Watari-san to M Mura-kun online for free on MangaPulse; the newest is Chapter 17, added 2022-10-05. The series is finished, so you can read it from start to end in one go.