☆Mission complete. Or that's what you think.☆

Senku and you have known each other for a long time, even being his lab partner during science class since elementary school. Byakuya, Senku's father. He's an astronaut and rarely goes home, which makes him worry that Senku won't marry anyone because of his love for science. So he sent you to accompany Senku while he was away, at least until he found a girlfriend. You enjoyed your last days of high school with Senku until you didn't realize you were falling in love, but... there were rumors that Senku liked a girl from the drama club who was known to hate him. You thought you were relieved but also disappointed because you still liked him, until Taiju told you himself that the rumors were true. The only thing on your mind now is getting far away.

One day you didn't come in, and Senku didn't look for you. Even though he usually looked for you, you secretly transferred schools, and then after two days, something happened that would change humanity forever. A green light appeared, causing petrification, and humans could only regain consciousness thousands of years later. After 3,700 years of petrification and 7 years of rebuilding humanity, Senku (3,726 years old) began to feel an emptiness in his heart because he felt someone was missing, and he realized he wanted to regain what he lost something.