Okami-san

Ashita no Joe
Okami's boxing coach Kumada looks like Danpei.

Episode 8
Episode 8 shows a series of girls from multiple series:

Toradora
Taiga, Minori and Ami are mentioned as bride candidates 10-12 in w:c:ookamisanandhersevencompanions:Episode 8.

Toaru Majutsu no Index
See w:c:ToaruMajutsuNoIndex