Clover (Chiya Toriko)

From ShoujoMagic:
Suzuki Saya, age 21, is an office lady who’s never been able to forget about the guy she liked in middle school. She carries on each day now getting reprimanded by her accomplished supervisor, Tsuge Susumu, and she’s not interested in having any romantic relationships… Until out of the blue, Tsuge confesses love to Saya, and brings a new prediction of love for her!?