Chocomatsu-san: White Day-hen - episode 1 - 12 Mar, 2021

Karamatsu actually received chocolate from Totoko on Valentine's Day. Even though the sextuplets had a rough Valentine's Day this year and spent a happy day alone, it seems that they are clearly frightened by something...? What is the end that awaits at the end of the escape? (Source: Translated from anime-recorder.com)