एपि. 4: ओत्सू ऋण चुकाने के लिए र्योशी की नौकरानी बनती है, जिससे उसके अतीत के आघात से निपटने के लिए समूह प्रयास शुरू होता है।

When Ryoushi protects Otsuu Tsurugaya from a stray baseball, she, being obsessed with repaying favors, becomes his maid and does all various things which makes him uncomfortable. While visiting Ryoushi's house to check on the situation, Ryouko and Ringo meet his aunt named Yukime Murano, an author whom Ryouko is a big fan of, who points out Ryouko's potential feelings for Ryoushi. Otsuu soon gets a fever from overworking and collapses due to fatigue. The others learn about Otsuu's childhood, where she was protected from a car by a boy who died before she could thank him, resulting in her having a fear of being unable to return favors. Ringo comes up with the idea of having everyone dress up as maids and serve Otsuu, reminding her that there is no such thing as favors between friends. (Source: Wikipedia)

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