UFO is a short stream-of-consciousness visual novel.

UFO is a boy's summer dream, a fragmented, brief, and surrealistic visual experience.

Teenager Plan, who is in middle school, is filled with confusion about the unknown. Like all children of this age, he is intrigued by the new and mysterious aspects of the world and humanity, while also harbouring fear.

In his dream, he encounters her, them, and it. The player takes on the role of Plan and experiences this summer dream together.