it's about a uke who falls in love with his older brothers friend(who also loves him secretly), one night the seme is staying over at his friends house and the uke goes into the kitchen to get water and finds the seme's watch and puts in on which he finds to big and then the seme enters the kitchen but its pitch black and he ends up touching the uke and see's his watch is on his hands and they somehow end up having sex infront of the fridge and after they finish the uke's brother catches them and says that the uke can be the seme bride but only after he graduate highschool.
sorry that was a long description but i can't seem to find this manga anywhere. 🙂 🙂

First story in Koutetsu no Daitenshi.

thanks 😀 😀