Third season of the Nobunaga no Shinobi series.

Remi is a boy living happily with his mother in the French countryside. But everything changes when his estranged father comes home and, in desperate need of money, reveals that Remi is adopted, and sells him. Heartbroken, Remi ends up with Vitalis, a traveling musician, and his troupe of animal entertainers. Together, they travel the country in search for Remi's real parents, along the way learning the harsh lessons of life. A deeply moving story about friendship, loss and the pursuit of happiness. (Source: AniDB)

Naho Takamiya's first day of her sophomore year of high school is off to an uneasy start. After waking up late, she receives a strange letter addressed to her. However, the letter is from herself—10 years in the future! At first, Naho is skeptical of the note; yet, after witnessing several events described to take place, she realizes the letter really is from her 26-year-old self. The note details that Naho's future life is filled with regrets, and she hopes that her younger self can correct the mistakes that were made in the past. The letter also warns her to keep a close eye on the new transfer student, Kakeru Naruse. Naho must be especially careful in making decisions involving him, as Kakeru is not around in the future. With the letter as her guide, Naho now has the power to protect Kakeru before she comes to regret it once more. [Written by MAL Rewrite]

A boy gets involved in an accident when in kindergarten, horribly damaging his arm, but the doctors somehow manage to save it. Now, several years later, his arm seems to be becoming the focus of strange events as it turns out to be more than a normal arm. Meanwhile, a secret organizations is out to get hold of him and the power he possess.