"the origin of species" and "the evolution of species"
"kiss me liar" and "Kiss me if you can" (although KMIYC is much better)
"Master, Please Leave a Mark" and "Chairman, Cut the crap"
"omega complex" and "alpha trauma"
you can see cameos of "honey trouble" characters in "K's secret" and vice versa
"poyun" and "breaking through the clouds 2: swallow the sea"
links? cant find them
The whole Kuroneko Kareshi series, it also includes Fukigen Kareshi and Wagamama Ouji wa Neko wo Karu and tenuously Neko-Ka Kareshi no Ayashikata
https://www.mangago.zone/r/l_search/?name=SAKYOU%20Aya
For your love and form of sympathy
https://www.mangago.zone/r/l_search/?name=Park%20Nodeok
I can't remember if they're yaoi or shounen ai, but 23:45 and 23:45 RE are amazing reads, especially 23:45 RE.
Recsss me some Bl stories that connects to each otherr