Kuzu no Honkai

Mugi and Hanabi are the perfect high school couple...but their relationship is built on a single shared secret: They're each in love with someone else.

(Source: Yen Press)

Included one-shots:
Volume 1: Nyan Nyan Prelude
Volume 2: Nyan Nyan Serenade
Volume 3: Nyan Nyan Oratorio
Volume 4: Nyan Nyan Cantata
Volume 5: Nyan Nyan Andante
Volume 2 contains the side story "Little Little Princess" (Little Little Princess).