Happy Complex - Ai ga Nakucha Dekimasen!!

Synopsis

Yuuri Tachibana works tirelessly to pay off her ex-boyfriend's debt. One day, she collapses from overwork while delivering a lunchbox to the penthouse of a high-rise apartment building. She awakens in the apartment of Shiki Sagara, the young CEO she was delivering to. Having lost her job, Yuuri accepts Shiki's offer of a highly paid position to "entertain" him, despite his arrogant personality. She signs a contract with one crucial condition: she must not fall in love with him.