Here are the Endings I got so far...sorry for the low quality images
Onigiri Ending!!!
They draw manga yet again...
Spoiler for Onigiri Beach:
This is where the part I think Harima tells his secrets to Yakumo...How hurt he is that he can't tell his true feelings. And Yakumo kinda understands him. BUT....
And you thought they where getting intemate..Tenma-nee-san pops out!! BOO!!!
WOOO FOR FLAG!!! HARIMA AND ERI KISS!!!
Spoiler for Flag Ending:
This is how it really ended poor Harima...
Harima - "Eh?!!"
Eri - "Hige no Baka! Baka!! Baka!! Baka!!!"
Here's with the fireworks