
Quick answer — Kouta Ooshita voices Kouta Akimoto in Yamada's First Time: B Gata H Kei, Bays in World War Blue.
Kouta Ooshita voices Kouta Akimoto (Yamada's First Time: B Gata H Kei), Bays (World War Blue).
Kouta Akimoto is voiced in Japanese by Kouta Ooshita.