Wenji (Keichiro Koyama), who was hired as a teaching assistant, wanted to invite Kururi (Hirohiro Hirasawa) out for dinner in order to thank her, but Kururi refused on the grounds of waste.So Wen Ji suggested that he go hiking in the mountains, where he could pick mushrooms and do geographical surveys.

Wen Ji also wants to introduce Xiangshan (Ichikawa Yui)'s daughter to Kururi who has no friends.However, when Jiuluri saw Xiangshan's daughter, he was stunned.She is her classmate Natsuki Ono (Ayaka Namiki), who once laughed at Wen Ji's bento.

Kururi concentrated on looking for mushrooms, but was accidentally involved in the slipping Ono Natsuki, and the two rolled down the hillside together.According to Wen Ji's teachings, if you get lost, go to the top of the mountain. Kururi and Ono Natsuki were on their way to the top of the mountain. Ono Natsuki told the reason for her prank, and Kururi suddenly became brighter after hearing this.So, can they get back to where they came from without incident?