The popular prince takes the popular ex prince as his princess, turns out they're each others' first loves and they have a happily ever after
Ch5 guy in coma 靈魂出竅 and his soul goes to harrass his classmate, then they end up dating
Ch 6 guy with a big dick cant find a partner, his neighbour is a bitch in heat, one day they switch bodies and have sex, they're so compatible for each other they cant do it with anyone else
Kuro Ouji no Iinari ni Naranai!