Akira Gunji, Sho Tenkubashi, and Raika Nadeshiko plunge headfirst into a cosmic clash against Raika's doppelganger Ririka-an assault weapon wreaking havoc across the stars! The odds seem insurmountable until Kaito Toya, Raika's unexpected ally, rockets onto the scene, catapulting Akira and his crew into an even more daunting battle.
Then, apart from saving the universe, Akira faces a quintessentially mundane challenge-he flunked a high school test! His schoolmates Sho and Masato Kizaki assemble at Akira's house for a tutoring session. Little do they realize that Masato's stay on Earth is more than just academic-it's a mission to find a bride!