第 4 集: 輝夜的貝殼要求、優的自我價值掙扎，以及千佳的過夜探訪
2022年4月30日 播出
Yu likes Tsubame, a third-year student who helped him out with the sports festival. However, with his lack of self-esteem, he believes it is impossible to ask her out, but Kaguya supports him; she wants him to get a top 50 academy score in the upcoming final exams. Yu does not make the top 50 in his grade. Feeling guilty and bitter, he vows to succeed next semester. Chika and Kaguya have a sleepover at Kaguya's residence. They phone Miyuki and ask about the person he likes; Kei answers with Herthaka, who he had become friends with, leading to a misunderstanding, as Ai is cross-dressing as Kaguya's butler under the same pseudonym. (Source: Wikipedia)