Ayaka is in Love with Hiroko Vol 01

This girls love workplace rom-com by popular Twitter artist Sal Jiang features two lovestruck coworkers — who each think the other is straight!
Ayaka is passionately, head over heels in love with her work senior, Hiroko. But no matter how hard she tries to catch her eye, the polished, professional Hiroko never seems to get the hint. What’s a girl supposed to do to prove her love to her boss?

Hiroko isn’t out at work — though she’s got a reputation for being a real womanizer in the local lesbian community. But her self-control is tested when her beautiful and busty work subordinate starts getting awfully close to her...

How's a professional supposed to stay cool when she's sure that Ayaka is totally straight?