Ore no Kirai na Yankee-kun.

Summary

Ever since Kaga's elder brother left home, he has been pushing himself to keep his parents happy - and meet his parent's expectation. Always pretending to be the perfect student tires him out and he vents his frustration when alone. One day while venting in the boy's restroom, he didn't know Saotome saw this and took a video. Saotome later confronts Kaga about knowing his "secret". But what is Saotome really after?