A chaotic joint party with the devil, Undyne, and the angel, Gagiel, is also in the final stage. Sakuma's friend Maki, who has gained popularity among the men, collapses after being cursed by Undyne's "jealousy" ability. Gagiel tries to steal the grimoire from Sakuma's bag, but Sakuma stops him and fails miserably. Gagiel uses Undyne to get closer to Sakuma, and he promises Undyne a date, but...