Takahiro Ogiso 小木曽孝宏

Setsuna's younger brother who's three years younger. Even though his sister always gets prioritized at home, he doesn't seem to mind that. He's big-hearted, honest, and cares a lot for his family. However, his sister also gets preference in her studies, so even though he hopes to attend Houjou University Attached High School, he has little hope of passing the exams.