"Let me tell you a story," Joohyun said. "Unless you think that a high school teacher like me doesn't tell stories at all."

"Anyway, it's a story about how the phrase 'unforeseen mayhap' could make you think different things to different people. Heck, it's a story involving foolish banters and sweet nothings, would you believe? But it's mostly a story about me having been so weak-willed, weak for a certain Kang Seulgi."

"I wonder, could I blame Seulgi for all of this? Nevertheless, it was she who started it. With her being so dangerous and troublesome, though I'm sure she'd call it as 'cheerful' or 'friendly' instead. Gimme a break…"

"People used to think I was compose and laid-back, but in reality I'm just standoffish. In the end, it all came down to running out of options. Either I face my flaws or I'm done for."

Bae Joohyun, an aspiring Biology teacher, is excited to teach at Anyang High. It has been always her dream to teach at her former school back when she was a student there. She's determined to not only educate her future learners but also to become their motivator in life. It's her plan after all.

And then came, Kang Seulgi...very sweet and clumsy girl who managed to catch her new Biology teacher in a not so very pleasing way when she was caught sleeping at the farthest corner of the room, near the windowpane.

She was not in Joohyun's plan. Let alone, falling for one of her students.

It's bad. Yet, she yearns for it.

Just for how long could she resist the charmer, Kang Seulgi?

Until that one night, a night that she never thought she'd cross.