Primo Secundo

Oto Amaike is not a prodigy. In fact, he isn't even sure why he studies piano. But when sharing a keyboard with Shirabe Nadachi, his purpose is clear: He is a secundo who plays the same piano as his primo. For reasons he has never understood, Shirabe abandoned their duet when they were children. Now Oto has met a young girl and is considering playing duet again. Which, of course, is the perfect time for Shirabe to reenter his life…