Sekai de Ichiban Yasashii Ongaku
世界でいちばん優しい音楽
The manga presents a heartfelt narrative centered on Sumireko, a single mother, and her daughter Nozomi. It begins with Nozomi at sixteen before shifting to events prior to her birth. The main story commences in the third chapter, when Nozomi—referred to as Non-Non—is three years old.
