The main character In Search of the Lost Future is an ordinary Japanese schoolboy named So. His main hobby in life is astronomy. He devotes all his free time to this science, and leads the school club for studying the stars. One day, the young man went to a celebration dedicated to the opening of a new building of the educational institution. There he got into trouble with local wrestlers. As a result, a fight broke out. The character lost consciousness from the blow, and woke up already in the hospital. There he tries to put his memory in order. Suddenly, a strong earthquake begins. The guy runs out of the hospital and heads towards the school. There the young man meets a naked girl. He tries to help her. From this moment on, friendship begins between the youth, which can develop into something more.

The heroine of In Search of the Lost Future is called Iya. She wants to join the astronomy club. At the same time, she wants to help it develop and become the most prestigious in the city. Perhaps these actions are caused by gratitude, or maybe other reasons. All this will become clear during the game. The user not only watches the development of events, but also takes part in them. You will have to control the character, perform the specified actions. You should also enter into conversations, choosing the necessary words. Thus, everything that the player does and decides affects the continuation of the story. As a result, romantic relationships should develop between the main participants. And the user helps in this difficult matter.