Logline: A boy who finds out the childhood friend he secretly likes is actually a princess from another world; where an unexpected adventure awaits.

Sato is an average high school student in Japan, who lives next to his classmate, Hime, a girl who is well known at school for her pretty looks. One day just before summer vacation, Sato receives a message from Hime inviting him to meet up after school. The two attends a shine festival close by, where Hime reminiscence about the last time they attended the festival when they were young. On the way home, Sato decides to confess his love for Hime, but she interrupts him and says that she is moving back to a place far away. She thanks him for the time together and says goodbye before going inside her apartment. Sato goes home and tries to make sense of the sudden development when he notices a strange light in the mountains close by. Sensing that it is something to do with Hime’s leaving, he heads to the source of the light, where he later finds Hime standing before a portal to another world. Hime reveals that she is in fact a princess from another world and it is time for her to head back, where she is to be married. Saying goodbye once and for all, she disappears into the portal. Sato hesitates, but then quickly finds the resolve to follow Hime into the portal.