Thank you for the update

there is. unless you mean one where they also have babies

Please tell me the name

these are the books in order

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 twins.

I have read those