俺、吉岡のこと好きだった――。
洸の告白を機に、着実に心の距離を縮める双葉と洸。双葉に背中を押され、洸は陽一に対しても素直に心の内を明かす。そんな中、双葉たちは皆で夏祭りに行くことに。当日、浴衣姿で現われた悠里は、洸に対して積極的にアプローチをする。一方、友人と祭りに来ていた菊池冬馬（曽田陵介）は双葉と再会し、前向きな双葉に惹かれ始める。それぞれの想いが交錯する中、悠里は洸に想いを告げるが――。
After Kou’s confession, Futaba and Kou gradually close the distance between their hearts. With Futaba’s support, Kou honestly reveals his heart to Yoichi. Afterward, Futaba and her friends decide to go to a summer festival. On that day, Yuri appears in a yukata and aggressively approaches Kou. Meanwhile, Toma Kikuchi, who was at the festival with his friends, meets Futaba again and begins to feel attracted to the optimistic Futaba. As their feelings become entangled, Yuri confesses her feelings to Kou, but…
