To persuade Ako to get cracking on her summer vacation homework, the girls have a study session sleepover at Kyoh's gigantic house. However, without Hideki around to keep Ako under control, things soon get out of hand.
If he had, it would have 
been a huge disaster.
De lo contrario,
habría sido un desastre.
Ç’aurait été un désastre, sinon.
Se l'avesse fatto sarebbe stato un disastro enorme,
Se tivesse atendido,
teria sido um desastre.