Heartful Maman / は～とふるママン

Kinosaki Mao lost his mother in his school years, and lived only with his father Hadmime.
But his father, too, suddenly left him just at the time when he entered university.
Leaving only a note in which he asked Mao not to worry about him.

Four years later, closer to the end of his studies, Mao still could not move away from his mother's death, and because of this he developed gynophobia.

And then, one fine day, his father, Hajime, returned home and brought in a new wife.
His new wife, Arima Shiori, not only has beauty, but also character is absolutely impeccable, she is really an ideal mother.
Amazed, Mao began to live an unexpected life with a new mother.
Shiori surrounds Mao with her cheerfulness and kindness.

Being in contact with her, Mao gradually begins to see in her a woman, not a mother.
The action that Shiori takes after he finds out about it becomes ... Popular game jack-o-nine tails.