Happy

The protagonist Youichi and his girlfriend Yume have been dating since they both entered high school, and are spending their days happily. Graduation is fast approaching and they both take entrance exams for the same college in Tokyo, but Youichi is the only one who doesn't pass. The day before Yume leaves for Tokyo the two of them have sex for the first time, but the inexperienced Youichi cums immediately and their first time ends in failure. Promising the depressed Youichi that she will return in one month, Yume sets off for school. Will Youichi be able to polish his (sexual) skills as a man, and create a happy end for them both? [Translation of synopsis from Getchu.com]