Puniru says she’ll spend the holiday with whoever brings her the cutest Christmas cake, but the offerings she gets are... interesting. When a certain someone loses their patience, she may yet get a Christmas to remember.

After Puniru goes missing in the middle of training to become cuter, Kotaro receives an unexpected package.

Kotaro is hit by a truck and finds himself in a world of swords and sorcery. Puniru learns about Valentine's.

When Runru breaks down one day, Puniru and Kotaro must find a way to have her repaired, but at what cost?