Koi wa Horonigaku  

Natalie is a secretary who harbors secret feelings for her boss, Kane, a successful businessman known for his playboy lifestyle. Despite believing that there was no chance of him reciprocating her feelings, she decides to move on by going on a diet and dating other men. However, this does not alleviate her emotions for Kane. Meanwhile, Kane starts noticing Natalie differently after assuming she had found someone new. He meddles with her personal life by inviting her over for business but things heat up between them.

Koi wa Horonigaku was published digitally in English as Bittersweet Love by Harlequin/SB Creative Corp. on May 7, 2019.