Okay so this one compared to many other step-brother series does have rape. Trigger warning for all. The seme is younger and in highschool. The uke is older and already a working adult, but he has a past of being a highschool delinquent. The seme originally hates the uke and his family. They get off to a horrible start but the seme accidentally gets drunk at the uke’s restaurant job and the uke takes him home. There the drunk seme confesses that the reason he can’t get over his mother’s death is because she was the only one who knew he was gay and accepted him. The seme in his drunk moment jumps on the uke and they go all the way. The uke was drinking beer when he got home so it is dub-con. They were both drunk, either way no real consent was established. The uke empathizes for the seme and he allows the seme to live with him temporarily. They continue their relationship and the uke agrees that if the seme still loves him when they get older than they can make their relationship official. The seme agrees and their families unite. The uke is strong and communicates really great *I mean he is the adult* the seme is younger and sucks at communication.
Gitei ni Himitsu ga Arimashite