Hina is feeling uneasy about her married life with her husband, who has reached a slump in their relationship. Worried about Hina's devotion to work, as if escaping reality, her colleague Yuta invites her to his house, where he suddenly confesses his feelings to her. Hina knows she should immediately tell him that this is wrong, but somewhere in her heart, hope is growing. Weighing her troubled married life against Yuta's devoted and passionate love, Hina chooses a one-night mistake...