Kimi dake ni Ai wo.

In order to put a period to a love where she only looks at the guy she likes, Sayumi decides to confess to her beloved Yui-kun! Thanks to her forceful action, they start dating. Every day, as she gets to know more and more about Yui-kun, she falls in love with him more. However, there's someone who he'd turn to look at every now and then...

(Source: Aerandria Scans)