They Should Stay Together (BL Undertones)
Anime
Characteristics:
1) The pairings are very clear (No involvement of third party)
2) Subtle (no 'I love You's, but more to 'I Would Die/Live For You')
3) Not focused on the pairings or even romance (pairings are mostly backdrops and the plot moves the anime)
4) YAOI/SHOUNEN-AI WILL NOT BE HERE
Special mentions (because they don't fit all the categories above): Sakamichi no Apollon, Vanitas no Carte
1) The pairings are very clear (No involvement of third party)
2) Subtle (no 'I love You's, but more to 'I Would Die/Live For You')
3) Not focused on the pairings or even romance (pairings are mostly backdrops and the plot moves the anime)
4) YAOI/SHOUNEN-AI WILL NOT BE HERE
Special mentions (because they don't fit all the categories above): Sakamichi no Apollon, Vanitas no Carte

TV, 2017,
12 eps
Me:-
Author:9
Amazing plot build-up. Great character driven story. Loooove the pairing interactions

TV, 2010,
12 eps
Me:-
Author:8
Both male leads are smitten with each other very slowly and both of them do not know why

TV, 2022,
12 eps
Me:-
Author:8
Opposite attracts. Almost cried seeing how they started and how they became in the end.

Movie, 2015,
1 ep
Me:-
Author:8
They call it friendship but I mean... The worldbuilding is very interesting. Never seen before anime plot.

TV, 2012,
13 eps
Me:-
Author:9
Maybe it's just the voice acting but the chemistry between each pairings are *chef's kiss*. Very underrated plot buildup.

TV, 2018,
23 eps
Me:-
Author:10
Male leads became each other's light in the dark. Amazing story 10/10

ONA, 2021,
11 eps
Me:-
Author:9
Can I have a bestfriend that would die for me too?

OVA, 2013,
1 ep
Me:-
Author:8
The manga is actually yaoi but the OVA is not (yet). Love the characters!

TV, 2018,
12 eps
Me:-
Author:9
The plot was what pulls me in. Pairing would take a bullet for each other

TV, 2016,
12 eps
Me:-
Author:8
One of my fave short-form sports anime. When they started calling each other by their first name. Very recommended