Summary
Masato Sendou is the younger son of the man who remarried Haruto and Aki’s mother following their divorce, making him the little step-brother to both Haruto and Aki. He is also the younger brother of Takahisa. Because mentioning Haruto in Aki’s presence is considered taboo, Masato was never informed that Haruto, who lives with his own father, is his older step-brother. On his first day of the sixth grade at elementary school, he was unexpectedly pulled into a hero summoning orchestrated by Takahisa and Satsuki.
