According to 7andY online shop, comedian Hurricanes Maeda's manga "Ontama!" was announced to get an online anime adaptation. It's a five-episode series and will be aired on Niconico Anime Channel from August 7th.

Ontama! volume 1 Cover
Ontama! anime official website

Ontama! is a two-volume series and had been published in Comic Yoshimoto and Comic Gum. The story author Maeda Noboru is a comedian belonging to Yoshimoto Kogyo and an anime otaku. He plays Baku in Onegai My Melody.

Synopsis:
Ichigo is 10 years old girl, who is living with her mother and stepfather. Her parents are always quarreling over Ichigo because she is not stepfather's child. One day, Ichogo time-travels to twelve years ago and meets her real father. She tries to mediate the marriage of her real father and mother, but...

Source: 7andY

Staff:
Director: Oizaki Fumitoshi (General Anime Director and Character Designer of "Kaleido Star")
Supervisor: Sato Junichi
Production Studio: Encourage Films

Cast
Orikasa Fumiko
Matsuki Miyu
Oumi Tomoe (Sasaki Juju in Sketchbook ~full color'S~)
Hisakawa Aya

Sources:
Tamatowa
Natalie