Wakarazuya no Renai Houteishiki
Uke has unrequited love for best friend. Seme realizes that and snatches him away trope
Daraku Kazoku-ron
Ririko probably knew that Yakuza-san is the bio father, but she didn’t want Meguru to be left in that lifestyle, so she decided on her best options even though they’re not blood related to the child. She was pretty irresponsible with her own life as well as Meguru’s though, sounds like she never acted like a mom anyways. Sentarou and Touma just happen to balance each other’s flaws perfectly, and just happens that Sentarou actually loved Touma, so it worked out, otherwise this whole situation would have gone VERY badly for little Meguru.
Hibari ga Naitara Tsukamaete
Two friends separated for 6 years after uke left due to family circumstances. Seme never forget him, always thinking of him as a special friend, but it turns out his feelings has always been ever deeper than that
Hatsukoi o Kojirase Sugiru na
High school best friends drifted apart because uke has an unrequited love. Re-encounter years later when the seme stopped the uke from entering a hotel with a man. Turns out their feelings were mutual, seme just didn’t understand his own feelings until they meet again.
Souteigai no Sweet Marriage