Ep. 10: Naoya's Hot Springs Date Involves Saki, Nagisa, Rika, and Shino Kiryū

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Shino Kiryū attempts to approach Naoya, but Saki intervenes. During a shopping trip for a hot springs date, Rika follows the trio. Nagisa considers kissing Naoya but supports Saki instead after seeing her stress. Rika discovers the date details, while Shino investigates potential two-timing. At Hakone, Naoya holds both Saki and Nagisa's hands. Saki suspects sexual activity. Rika and Shino are found at their hotel, with Shino confirming the affair. Nagisa blackmails Rika using a Milika photo to hide her involvement. Naoya refuses to exclude Nagisa and invites her to join, but she declines. Left alone with Rika, she attempts to seduce him.