See you later, Mermaid
Technically shounen-ai but there's a little scene in the last chapter. Both of them loved each other, but we're too scared to ever confess. The uke has a power (voice) that can make people do what he suggests.
A story about a yakuza who picked up a Vampire
Kohinata-san Chi no Chounan wa Fukigen
The older one (seme?) moved into the younger one's (uke?) family to be the housekeeper.
code:
Sequal to http://www.mangago.me/read-manga/makkurayami_de_kimi_to/
Shounen Houkokusho
The protagonist is the child. His father and mother divorced and are happy with their new lovers. His father has a male lover who he has intentions of marrying. The child is very accepting of the relationship and literally pushes them to get married and stands up for them. Nice to see this type of story from the child's perspective.
Ouchi e Kaerou: Neko Mimi Omegaverse