Does hikaru and yoshiki count - TSHD (not a BL mainly about horror but they like each other)
A very niche one is Maskless Mark and William - invincible series
Quanxi and her girlfriends/harem - chainsaw man
Reki and langa?
Tsubakino and umemiya (one sided though )
This one still makes me laugh (in a good way) Nendo and hairo - Saiki K
