Re:Birthday Song - Koi wo Utau Shinigami

Kokoro, wasn't selected by anybody to be her partner as she performed poorly in all disciplines of Reaper study. As a result, she was grouped with other cadets that were falling behind, and was made to take special supplementary lessons. The other attendees of these supplementary lessons are fellow Reaper cadets. It's filled with unique guys, all with their own reasons for attending the school.