Suguru Matsui is Ryo Shindo best friend in school.
Suguru Matsui is a supporting character in the Haramitai Kanojo series created by Nico Pun Nise. It originally began serialization in Angel Publishing's Angel Club magazine in 2010 under the original title of Kunoichi Drop.
His first appearance was in Haramitai Kanojo Volume 1 CH. 2 "The Rite of Intercourse".