I wonder if I can make 100 friends (volume 1-5)

Publisher: Kodansha
Author: Minoru Toyoda
Size: 128mm x 182mm
Number of books: 5
Language: Japanese
Category: Youth manga, manga
Latest release date: 2011-04-22

Synopsis:
A 36 -year -old elementary school teacher, Naoyuki (Naoyuki), had a happy day with his wife who had been giving birth. Meanwhile, an alien who suddenly came to invade the earth. To prevent their invasion, they have to make 100 friends to prove the existence of love. In 1980, the direct go to the aliens was taken to the aliens in the world of the third year of elementary school. The deadline is until you graduate from elementary school !! Mission that puts the fate of the earth !!