How about this one? :D
http://www.mangago.zone/read-manga/brothers_yamamoto_kotetsuko/
Thank you very much.
I really like it.
ヾ(☆▽☆)
Check it out..
http://www.mangago.zone/home/mangalist/213/
About music:
http://www.mangago.zone/read-manga/destinies_cross/ (if you liked yokan I recommend this)
http://www.mangago.zone/read-manga/kuchibiru_ni_amai_doku/
http://www.mangago.zone/read-manga/netemo_sametemo/ (sequel of the one above)
http://www.mangago.zone/read-manga/given/
http://www.mangago.zone/read-manga/hard_rock/
http://www.mangago.zone/read-manga/gravitation/
http://www.mangago.zone/read-manga/yoru_to_asa_no_uta/
http://www.mangago.zone/read-manga/katayoku_no_sokubaku/
http://www.mangago.zone/read-manga/aitsu_no_heart_ni_hi_wo_tsukero/
About stories like super lovers (brother x adopted brother), I recommend this http://www.mangago.zone/read-manga/zutto_issho_ni_kurashimashou/
Anyway if you want take a look here
http://www.mangago.zone/home/mangalist/97503/
Can you recommend some yaoi or shounen-ai about brother x brother like Super Lovers, Family Border and some yaoi or shounen-ai about music like Yokan and Yokan ex Noise?