Kaito Irie

When Tsukasa was a middle school student, she had a crush on transfer student Hayato and even confessed her feelings to him. She was turned down by Hayato. Now, Tsukasa and Hayato are classmates in high school. Hayato treats Tsukasa as just a friend, but Tsukasa still has feelings for him. Meanwhile, Hayato becomes attracted to Tsukasa.

恋愛に対して積極的で社交的だが自分の気持ちをうまく表現できない朱里(浜辺美波)、恋愛に消極的で自分に自信のない由奈(福本莉子)、朱里の義理の弟・理央(北村匠海)、由奈の幼なじみの和臣(赤楚衛二)は、同じマンションで暮らし、同じ高校に通っている。由奈は理央に憧れていて、理央は姉の朱里に好意を抱いていた。