信頼していた実家の叔父に遺産を騙し取られたこと

The root of Sensei's distrust of humanity traced back to his youth. Swindled out of his inheritance by an uncle he had trusted, Sensei despaired of his relatives and began living in a Tokyo boarding house. Exposed to the warmth of the boarding widow and her daughter (O-an), Sensei's desolate heart was gradually healed, while a hidden love for the daughter began to sprout.