Responses
Scramble Game by Kanbe Akira?
http://mangafox.me/manga/scramble_game/
The 'mistake'
They go on school trip and he sees the teacher go in the other students room and believes he lost.
'm searching a manga that involves 2 students that make a bet on a lecturer/teacher. Then one of them suddenly heard or misunderstood that the teacher already choose the people that he's love which is not him. But at the end actually the teacher choose him, do anyone know about this manga? Σ(っ°Д °;)っ