Geto Suguru's All-Powerful Big Brother

Geto Suguru has an older brother, Geto Arashi.

In Geto Suguru's memory, his older brother was very frail. Before Suguru turned twelve, his brother had to spend a few days in the hospital every month. Two months after he was diagnosed with a terminal illness at twelve, he was moved straight into a VIP hospital room.

In Geto Arashi's memory, Geto Suguru has a strange gift: he can see things ordinary people cannot. But his dear little brother seems to think he's weak, and even thinks he doesn't believe Suguru can see those strange things.

Geto Suguru: My brother is very frail, and he doesn't seem to believe in jujutsu, but he's really smart and good at everything. I respect and love him dearly.

Geto Arashi: My little brother always thinks I'm weak, and even thinks I don't believe him. But when he said he could see those things, I was the one who kept him at home and stopped our parents from sending him to a psychiatric hospital.

(The main story starts in Chapter 3. You can skip the first two chapters.)

P.S. Geto Arashi was, in his previous life, the second Ultimate Jack-of-All-Trades from Hope's Peak Academy. After experiencing the Tragedy and finding the world unbearably boring, he helped Makoto and the others rescue most of the people, then decisively found a place to sleep forever. After reincarnating, he became Geto Suguru's younger brother. He retained all his talents and memories.

Theme: A little idea I had, for the sake of the cult leader.