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Nao Yoshikawa and Hisashi Uehara, now university students, live in neighboring apartments, continuing their close relationship after sharing a home in middle school due to a housing scam. Nao, cheerful but somewhat scatterbrained, keeps their living arrangement a secret from her parents, but her father’s unexpected visit threatens to expose them. Their daily life involves navigating typical couple dynamics, with Uehara’s calm and intellectual personality balancing Nao’s energetic nature. New challenges arise as they juggle school, friendships, and part-time jobs, with Nao occasionally helping at a local diner. Their interactions with friends, like Marina Konno, add humor and warmth to their evolving bond.