Responses
He's not in high school there, he went to the trip as an adult escort, probably was hired as a trip photographer
As Aki's Fan said... he volunteered to chaperone the teens as a favor for a former teacher of his, but I think we can assume Akihito used to wear a gakuran since the students attend his former school and that is the kind of uniform they are wearing.
I bet Asami wore one too... ( ˘ ³˘)
Asami in gakuran pretty hot ლ(´ڡ`ლ).
Okay so Akihito wear a gakuran when he was still in high school?
http://www.mangago.me/read-manga/koisuru_finder_no_hyouteki/uu/koisuru_finder_no_hyouteki-chapter-1/12/ - See more at: http://www.mangago.me/read-manga/koisuru_finder_no_hyouteki/#sthash.BdjqEMpv.dpuf