Is the age difference between Dino and Maika in Blend S traditionally okay for romance in Japanese culture?


As an American, it seems weird for a 26 year old to be romantically interested
in a 16 year old.

<http://blend-s.wikia.com/wiki/Dino>

<http://blend-s.wikia.com/wiki/Maika_Sakuranomiya>

