Strobe edge

Starting out, Ninako is a girl who will believe whatever she's told unless evidence tells her otherwise. Her friends tell her she's obviously in love with her male childhood friend? Okay, so this is what love feels like. Then she encounters another boy who actually makes her heart beat faster.

Ninako is really naive and overly inclined toward blushing. By the end of the first volume there are three possible love interests floating around, with love triangle potential as well. I don't have high hopes for this series but the first volume is nice enough.