Gurechawanaidene Manga

ぐれちゃわないでね ; Gurechawanaide

Tsukishita is completely dependent on his little brother. It's the first day of school, and his little brother has already had to find Tsukishita with the things he's forgotten. When a group of girls try to help him find his older brother, they mistakenly think he's Kagami's. When Kagami realizes who he is, he also remembers the day he confessed to Tsukishita. Tsukishita offhandedly said some heartless things to Kagami; did he really mean them the way they sounded?