Katekyo Hitman Reborn!

Clash! Survival Snow Battle (1x15)

Air date: Jan 20, 2007

All of Tsuna's friends show up at school during winter to help him babysit I-pin and Lambo. Although, in a turn of events, everyone besides Tsuna seems to just want to have a snowball fight, so Reborn turns it into another one of his staged competitions.