Straight Title Robot Anime is a CG anime that first aired on February 6, 2013 in Japan. The anime is created with the MikuMikuDance animation software, and is the first MMD-based program to air on TV.
H2O's story revolves around Takuma Hirose, a blind young male junior-high school student, though the cause for his blindness is undetermined. After his mother died unexpectedly, it left a deep emotional scar on him, which caused him to become very lonely and reserved. Due to this, Takuma and his uncle move from the city out into a rural area and Takuma is enrolled into a new junior-high school. At his new school, he meets several new girls, though three of whom he gets to know the most out of anyone else; the firm and obstinate Hayami Kohinata, the kind and obliging Hinata Kagura, and the cheerful and mysterious Otoha. As Takuma interacts with these girls, his medical condition gradually begins to heal and he fully recovers.
Four fierce girls train to become great heroes at High Guardian Academy, where they form allegiances, uncover betrayals, and discover their true identities, while preparing to protect the world from an ominous unknown threat.
Various reports of irregularities are flooding in from all corners of Fairytale Kingdom. The truth is, Fairytale Kingdom is on the verge of destruction! This is because the happiness within peoples' hearts, the "Happiness Tone", is disappearing. The only ones who can restore the Happiness Tone are the legendary Princesses... The queen dispatches 3 "Magic Pets" to the human world. Upon arrival, at a concert held by the popular idol, Wish, the Magic Pets meet 3 young girls who have within them the power to become Princesses.
High school student, Naoya Aizawa is having a normal day with his long time friend, Tama. But on his way to school, every person in the train station suddenly disappears... except for one girl.
Sato's life – or what's left of it – is a paranoid mess of conspiracy theories and social anxieties. He's terrified of the outside world; his apartment is overflowing with the remnants of cheap take-out food; and his retinas have been permanently scarred by a steady diet of internet porn. But maybe it's not all his fault. After all, the nefarious N.H.K. is out there, and they’re determined to turn society's fringe-dwellers into a brainwashed lot of jobless, hopeless, futureless recluses.
Enter Misaki – a mysterious girl-next-door type who is Sato's last chance to beat-down his inner demons and venture out into the light of day. She's ready to help him overcome his crippling phobias, but Sato would rather cower in his existential foxhole and pretend to work on the demo for his virtual sex game.
He’s afraid to face the world. She's strangely desperate to fix a total stranger. Maybe together they can be normal.
Hero was a high schooler living an ordinary life.
One day, he meets a very strong and intelligent mechanical arm named "Mecha-ude". After a strange turn of events, the "Mecha-ude" started living inside Hero's hoodie and the two's life full of trouble begins.
As the boy and his "Mecha-ude" fights together and strengthen their bonds, the two also meets new friends who also fights along with each of their own unique "Mecha-ude" partners.
Out of those, one of the heroine has two "Mecha-ude" which appears out of her skirt. An active girl with a totally opposite characteristics from hero himself, he gradually becomes attracted to her.
But the two are confronted with other "Mecha-ude" users who are in search of the secret of "Mecha-ude" relentlessly.