Meteor-san Strike desu!

Hiro Kobayashi, an unremarkable student, is chosen to safeguard Earth from Yamada Meteor, a mysterious transfer student. Suddenly thrust into a dire situation, he must confront aliens and the threat of human extinction. Overwhelmed by the sudden responsibility, Hiro struggles to understand his role in preventing disaster. The only hope seems to be "love," though how to use it remains unclear.