I don't remember the title, but what I do remember is that it was a BL where the protagonist transmigrates to another world along with his sister, and where the female protagonist, instead of loving the male protagonist, falls in love with the villain, and the male protagonist falls in love with the boy who transmigrated. I read it years ago and it got deleted from my list :(
I'm looking for the name of a webtoon about a man who can enter dungeons and use guns and drones that he creates himself, since normal world technology doesn't work inside the dungeons. My older sister also asked hahaha
I have a few ideas...
Solo Spell Caster: https://www.mangago.me/read-manga/solo_spell_caster/
The Gamer: https://www.mangago.me/read-manga/the_gamer/
I could be wrong tho

I'm looking for a BL manhwa about two friends, one of whom is in love with the other but hides his feelings because his other friend is homophobic. One day, the friend tells him he likes men, which leads to a fight between them. To make peace, the homophobic friend suggests that if they have sex, maybe one day he can date a girl. But then the gay friend tells the homophobic friend that he likes someone, and the homophobic friend gets angry because he had hoped that one day his gay friend would get married and have a child so he could be part of his family and they could stay together. After the gay friend tells him he doesn't want to be his friend anymore, the homophobic friend realizes he loves his friend and does everything he can to win him back.