If you're looking for manga similar to Toshi no Sa: My Steady, you might like these titles.
After misunderstanding a situation, Micchan immediately tries to help out a cute girl. Finding out that the girl was an upperclassman, she tries to be friends for a closer bond. Her senpai had other plans, making them limited-time friends.
If imitation is the sincerest form of flattery, then Takahashi Mako is certainly being paid a great compliment... unfortunately, she doesn't see it that way.