>>279858326
>Does that actually happen?
Literally the next volume.
>Why does the dude even agree to go and help some chick instead of his staying with his girlfriend anyway?
1) He dozed off on the beach and woke up in a car with Kurehu, Sakura and Rion riding to the airport.
2) Yuu is a coward having no opinion of his own and does whatever he's told.