Jazz for two
Lezhin Season 1: Chapters 1 - Season 2: Chapters The older brother had an affair with the Piano teacher (was blonde haired father), but got found out and so he decided to suicide. I can't tell If the older bro was always planning it (Reference chapter 64) or not. He wanted to be the happiest before he was gone, so I guess he decided to go with the affair and no regrets... even if the result affected everyone else. I felt bad that their affair lead to a broken Families and so much pain for both MC and ML. It's more of a Shounen Ai bc everything is mostly kissing and off panel. But, you could say it's Yaoi too, but more of Shounen Ai category fits better. This series deserves so many reread. I also listened to all the music that was talked about in here and it's all wonderful music. It fits the comic so well and you'd cry if you listened to the music's while reading.
Amai Kimi ga Suki