Tanaka-kun Is Always Listless Temporada 1 Episódio 7

Today is Valentines Day. While girls and boys are excited, Tanaka, whos not interested in Valentines at all, finds a box of chocolates inside his bag. Judging by the pretty box, its obvious the giver has feelings for him, but Tanaka feels despair just thinking about having to show gratitude or giving something in return. Theres no name on the attached message and only says “Im watching you all the time.” Tanaka and Ohta try to figure out the culprit... i.e. the girl behind the chocolates.