Junjou Pine

あらすじ

In the year 20XX, Earth faces a grave threat from the invading Onappu aliens. To avert disaster, Dr. Purehearted discovers Mitsuo and Michiru, two individuals crucial to humanity's survival. If they can exchange the "Ancient Exchange Diary" twice within a five-minute window, the powerful Maiden Purehearted Pine will manifest to protect the planet.