Katekyo Hitman Reborn! dj - Marmalade no Sora ga Jam ni Kawaru Koro

Pairing: Hibari x Tsuna

So many people unexpectedly show up to help celebrate Tsuna's birthday that they run out of drinks. While out buying more drinks, Tsuna runs into Hibari and they walk together as the sun sets.

Reprinted in Doujin Sakka Collection - Kuriya