Sei, who lives in Tokyo with her husband, has an annual summer tradition of staying at her sister's house in the countryside. Sei's brother-in-law, Seiji, harbors a secret admiration for Sei, but keeps it hidden deep within his heart. To distract himself, he decides to go gather mountain vegetables, and Sei, having nothing better to do, joins him. Several hours later, as they happily forage for mountain vegetables in the depths of the mountains, they are suddenly caught in a heavy downpour and take refuge in a nearby mountain hut. No one comes to pick them up, and Sei and Seiji spend the night together... In this situation, Seiji can no longer suppress his hidden feelings.
