My Wife is Wagatsuma-san

Synopsis

Hitoshi Aoshima is an unpopular high schooler with average grades. He longs to have a girlfriend, especially the beautiful and smart Ai Wagatsuma. One day, he discovers he has time slipped 10 years in the future, where he is married to Ai. However, the time spent in the future is short-lived as he returns to regular time. Hitoshi is able to use some of his future knowledge to gain insights into what Ai likes, but soon discovers that some of his present actions can affect his future, including scenarios where he is not married to Ai. He also hangs out with a group of unpopular and quirky classmates called the DX Corps, and makes other friends including a female foreign exchange student and a fairly popular boy that the DX Corps disliked.