not much, you shouldve realized that
Uke is 17 but the seme is a ceo so
21+ he hasnt been ceo for long
I guess the seme is around +/-25. I didn't read the Lightnovel about his youngest brother, but from reviews etc. I remember that the third Shouto brother was 23 and at that time Keiki was having those parties to search for his fated pair. So αNo Hanayome must take place around or directly after that lightnovel.
Oh thank you
What's there age difference?