Ai wo Shitteiru

One day, Tono Toshihiko picked up a boy in front of his house. The boy, Shinobu Ayaori, is a student at the school where Tono works, an honor student who is well-liked by the teachers. However, in front of Tono, he acts like a mischievous boy hungry for affection. Tono gradually became attracted to Ayaori, but then he noticed the numerous scars under Ayaori's uniform...

(Source: Gateau Comics, translated)