What's there age difference?
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.
Where can I read the novel??? Please
Yes, please would like to read the novel too