Katekyo Hitman Reborn! Reborn VS Kyouaku Hitmen
リボーンVS凶悪ヒットマン
Reborn vs Evil Hitmen is the 176.1st chapter of Akira Amano's Katekyo Hitman Reborn! and is assumed to take place before the Future Arc, therefore this chapter takes place in Namimori present.
(Source: Reborn Wikia)