1-2) Ouji no Kikan
Satake Kou attended the wedding of his sister where he was reunited with his cousin, Fumihiro, who used to be a very dumb fat guy, then transformed into a charismatic prince! Kou became undeniably self-conscious about this while not being aware of Fumihiro's high regards towards him since they were little. Fumihiro's admiration has turned into something complex. How would Kou respond to Fumihiro's feelings?
3-6) Metamorphosis
Adachi has been friends with Ritsu since they were children. Suddenly, Ritsu starts changing and acting like Adachi has never seen him act before... and the reason for that change seems to be Ritsu's new senpai, a troublesome guy. Adachi slowly realizes that he feels more than just friendship towards Ritsu... but it's too late.
7-9) By His Side
10) Ouji no Kikan Extra
These are recommendation lists which contains
Ouji no Kikan. You should give them a visit if you're looking for similar novels to read. Alternatively, you can also
create your own list.