In a family there’s a foster brother who was adopted when he was a baby because the mother couldn’t concieve, 3 years later she gives birth to a child. The foster child knows that he is adopted and does all in his might to be the good boy and eventually “pay back” his school fees and so on. The biological son of the family notices that his older brother always puts up the “good boy front” and pranks him so as to direct his attention from his parents to himself. These pranks turns into sexual harassment in which he kisses his older brother to relieve stress, the kissing turns into rape. He eventually realised that he is in love with his older brother. Good story, wouldn’t rec for someone who can’t read rape scenes.
Kawaikunai Aniki o Aegasu Houhou