Suteneko Tora-chan  

Abandoned Cat Little Tora, すて猫トラちゃん

A group of feline relatives discovers a stray kitten and decides to take it into their abode. However, one of the siblings develops envy towards the newcomer's mother-cat's affection for him and escapes from home. The recently adopted cat then searches for his lost sibling with the aim of returning them safely to the family fold and gaining acceptance as a permanent member.