Unable to accept the relationship between the three, which is gradually falling apart, Suji takes on the challenge of the “Kolatz Conjecture,” a difficult problem that has yet to be solved, relying solely on mathematics. But what awaits him at the end of his challenge is a shocking conclusion that no one could have predicted.

Eien ni Tsuite no Shomei

High school boy Machida is a loner who is not particularly good at his studies or extracurricular activities. He does seem to have his heart in the right place however. When he is injured at school instead of the school nurse at the infirmary a school-mate tends to him. He develops a crush for her and soon enough the feelings are returned.

The World of Machida-kun

What's the biggest event for a couple? A wedding! The goofy but earnest Akito Ishikawa and the always cheerful Haruka Nitta are about to tie the knot. Thanks to the help of their wedding planner Nakagoshi, they've finally made it to the day of the wedding.

Wedding High

Toshihide works as a doctor at a clinic located by the sea. One day, he meets Ako. She looks exactly like the woman he admires. Due to her, his heart flutters. Soon, Toshihide realizes that Ako is not his ideal woman. A case leads to Ako to begin living with Toshihide and his family. Living with the warm-hearted family, Ako slowly regains herself and becomes a person with a truthful and honest mind.