Isshuukan Friends.

12 episode long with 12 special episode ... it's funny and interesting .. translated in German .. 

Sixteen-year-old Yuuki Hase finally finds the courage to speak to his crush and ask her if she wants to become friends. The object of his affection, Kaori Fujimiya, is a quiet and reserved girl who cuts herself off from everyone and does not spare him the same blunt rejection she gives everybody else.

Some time after, Yuuki finds her eating lunch on the roof where she secludes herself during break. He decides to start meeting with Kaori every day in the hopes of beginning to understand her better. The more time they spend together, the more she begins to open up to him. However, nearing the end of the week, she starts to push him away once more. It is then revealed to him the reason for Kaori's cold front: at the end of the week, her memories of those close to her, excluding her family, are forgotten, as they are reset every Monday. The result of an accident in middle school, the once popular and kind Kaori is now unable to make friends in fear of hurting the people dear to her.

Determined to become more than just one week friends, Yuuki asks her the exact same question each Monday: "Would you like to be friends?" Because he knows that deep down, Kaori wishes for that more than anything.

Kaori Fujimiya (藤宮 香織)

Gender: Female
Age: 16-17
Birthday: December 1st
Height: 161 cm
Weight: 47 kg
Eye Color: Brown
Hair Color: Brown

Kaori Fujimiya is the deuteragonist of Isshuukan Friends and Yuuki Hase's classmate. At the beginning of the series, she is always alone and does not seem to have any friends. This can be attributed to her chronic memory loss, which causes her to lose all her memories of the times she was happy and of those she considers friends every Monday. Despite her efforts to resist Yuuki's advances to become her friend, she eventually warms up to him and they become close 
friends.








Yuuki Hase (長谷 祐樹)

Gender: Male
Age: 16-17
Birthday: July 14th
Height: 169.7 cm
Weight: 57 kg
Eye Color: Brown
Hair Color: Light Brown

Yuuki Hase is a high school student who notices that his classmate Kaori Fujimiya is always alone. He endeavors to be her friend even after learning that she loses every memory of her friends each Monday.

Hase's easily seen trait throughout the whole series is his apprehensiveness. Instances in the media have depicted Hase is hesitant and almost fearful of moving forward and taking the first step. He is also quite simple-minded, as he can be pleased and displeased by very seemingly minor details. However, he is very headstrong and bold when he finally comes to a decision, and will not rest until he has seen his decision through.

Hase can get easily jealous and mindful of certain things, such as the instance when Kaori talked about Shougo so much that Hase was beginning to get jealous. In this regard, Hase is naive and impulsive, often acting before thinking when he is aggravated. He also sometimes jumps to conclusions, further worsening the situations he gets himself in.

However, Hase is kind by nature, and likes to socialize with people as a normal high-schooler would. He treats everyone with an equal amount of respect and kindness, save for people he has gotten to know better (except in the case of Hajime, they aren't quite friends.) He tries to be considerate and polite as much as possible, though there are instances where his emotions can get the better of him and this doesn't turn out so well.