Middle school teacher TakagishiAkemi’s interest is piqued by a boy who stands alone in the classroom With sad eyes, he stays away from the others His nahosts’ so his classmates alienate him Akemi tries her best to understand this lonely boy, but… the iedy that awaits – how does Yaku past as told by Isshi nhis past, which was shrouded inchildhoodA prequel to the shi nrei Tantei Yakumo series