Isekai BL

[ transported to another world upon his death ]

[ transmigrated to another universe where he's in a relationship with his rival ]

[ transported to another world where he became the demon king, check out its anime adaptation too ]

[ title sums it all ]

[ summoned to another world ]

[ summoned to another world where he needs love to survive ]

[ isekai bl anthology ]

[ reincarnated ]

[ school rivals transported to a fantasy world ]

[ novel character reincarnated in the human world and back to his previous world ]