It is tagged as shounen-ai but honestly it's not concrete, it's like, a nail away from being concrete but it still isn't so it comes here. Large amounts of fanservice and bromance, obviously, but the plot is GOOD, so good every now and then it comes to my mind "have I recommended this? Oh, I gotta recommend this to people!"
Nagai (protagonist) X Kai (best friend)
Kai's devotion to Nagai is somewhat similar to Hide's towards kaneki (Tokyo ghoul isn't included in this list as I don't think their bromance/Fanservice is present enough in the story to be a main selling point).
There's a lot of pain in their relationship but it does feels like a whole "it's you, in every life, it's gonna be you" and I can't really explain it in the way I want to but it's worth it.
St
Eru (MC) X Rihito.
Also Eru X everyone. Rihito X Haruto (his cousin)
Very clear what was the goal here. It would've prolly have turned into a harem of men interested in Eru but it ended clearly way too soon. MC is built like an otome game protagonist so the bromance was made for fanservice. The read itself was kinda meh but it was so clearly made to allow readers to ship the characters that if feel wrong if I didn't add it here.
Light but constant fanservice. Bromance drawing compositi
Qiu Ning (pink hair) cheng haiyan (black hair)
Sport (billiard/pool) + competition + teaming up + friendship
Growing romance as main plot. A nice amount of fanservice, very intentional, seemingly.
Side characters also get involved in the cycle of fanservice.
(when I added it wasn't marked as shounen ai yet)
Yamada Tarou (MC) X ALL the male characters
Isekai + otome game + comedy + adventure
Complete
The plot IS fanservice. Some characters (like dyu and Fil) have very strong bromancey bonds.
Tarou (alias) enters his sister's otome game, his heroine savior move is physical contact with somebody, usually hugs, the more contact the stronger the power is ampliated. No, he doesn't turn into a girl. He's a bit "too straight" in the beginning but things get better.
Just nonsense and pointless bromance
Slice of life, school life, comedy
Ch. 1 Ema trying to deny to himself that he thinks Hayashi is cute
Ch. 2-4 Hayashi being a weird little guy
Ch. 5-8 medaka and nikaido's friendship
on ch.5 medaka admits that his feelings for nikaido are more than platonic and on ch. 6 nikaido blushes thinking about him, so…
Also, the whole thing is very bromancey/fanservicey
Seita tachibana (blonde) X hayato fujiwara (raven) main characters; but also the cops.
Light horror + action + supernatural
Strong bromance, a very light, not common presence of fanservice too.
There are some girls but both boys seem to see the as casual friends or with familial love. The strongest platonic feeling is with each other.
Joonseo (MC) X Taehoon (guildmaster)
Adventure, dungeon system
Mc is the only from his class of power that can make weapons that can withstand guild master's full power and the gm also becomes interested in him overall, so bromance is there.
I also believe there will be some fanservice as it is not only typical of this type of work but because things are pointing towards it.
Cedric (ML) × Jesse (MC) × Christelle (FL)
In the novel it's very prominent how the two in the back have insanely strong feelings for Jesse, and they actually do have a qpr marriage typa deal in this world (the queen has this with the highest cardinal and she calls her partner and treats her as equal to her dead husband), and both Chris and Ceddy become that for Jesse, but you can fully read them as romantic.
MASSIVE bromance and fanservice.
Warning: I only read the novel, I dr
Ash (the main character) and Lucas (his knight), but also Damian (and the little girl) seem interested in him so that's fun
Adventure + Isekai + action + fantasy
Fanservice present, some bromance too
Sankaku Mado no Sotogawa wa Yoru