It's all about them having babies and hayato becoming pregnant sensei got worried about baby issue it's solved now , this whold tension reminds me of straight stories having child with struggle and escaping and all if hayato's bro and his lover didn't helped them things wouldn't have been easy it's really good read, it's too sweet I need someone bitter now.
1-(Hatsujou) - Younger bro Takao found his lifetime pair, the teacher Yuuki.
2- (Yokujou )-[Spin-Off] – Big bro Hayato’s fated pair, Shirou turns out to be a rival yakuza.
3-(Misujou)- [Sequel of 2] - Hayato somehow turns into 'Eve' type then bears lovely twins!
Mitsujou