The seme is your average homophobic cunt and then Harada sensei was like "we don't allow that shit here <3" and gave him a traumatic experience so he could stop being so arrogant. I really liked the uke (he was so horny lol) and the only part that might be scary for some readers was the abduction chapter. It's crazy how fast everyone let that go...
sequel: http://www.mangago.me/read-manga/yoru_to_asa_no_uta_ec/
Yoru To Asa No Uta