My Wife is Wagatsuma-san, Volume My Wife is Wagatsumasan 4

One day, a superaverage 2ndyear high school student who wants a girlfriend, Aoshima, suddenly awakens to the ability to time slip. Ten years in the future, he is *gasp* married to the cutest girl in school, Wagatsumasan! In the present, they are only classmates, so how in the world does he end up with the unobtainable Wagatsumasan?! A timeslipping Romcom coming at you from a brand spanking new duo!