Happy☆Lesson Advance

(Esta sinopse está em inglês. Ajude a comunidade traduzindo!)

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Hitotose Chitose is now living together with his 5 teachers as his mothers when a mysterious girl appears and becomes their neighbor which turns out that that person is Nagatsuki Kuron who wants Mu-chan to be her mother so another sibling rivalry ensues as to who would end up as Mu-chan's child.

(Source: ANN)