Her - as an IT student who's been hiding her true identity about the creation of the cryptic and complex Malbolge programming language. Him - as a IT professor and who's been determined to bring down the person behind Malbolge, not until a student of him show a potential to become a successful in the future so he set out to undermine her success, unaware that she was the one responsible for the language's creation.

Her-as a young woman with a radiant smile, had a unique outlook on life. She firmly believed that a simple, sincere smile given to a stranger could be the only ray of sunshine in someone's day. This belief was the driving force behind her daily interactions with the people she encountered ---- but then when the stranger guy fall for her smile he's been looking for her everywhere.