Nanairo Kakumei(2015)

Nanairo Kakumei

"The real friendship story" centers around Nana, who constantly finds herself unable to refuse the wishes of her childhood friend Yuyu—such as styling her hair the same or carrying the same accessories—even if she hates it. She decides she wants to change her attitude and won't follow everything Yuyu says anymore.

(Source: Anime News Network)