In a bustling office, the tension between two colleagues reaches a boiling point. The protagonist, a dedicated and ambitious employee, is suddenly thrust into an unexpected situation when her boss, お父さん, announces a new assignment—one that involves a surprising twist. A miscommunication leads to a series of events that place the protagonist in a position she never expected: a contract with her senpai, a senior colleague known for his bold and sometimes intimidating presence.
The contract, signed with a mix of reluctance and determination, binds her to a weekly ritual as the senpai’s exclusive "eromeido"—a term that hints at both service and intimacy. At first, the protagonist is hesitant, but as the weeks go on, the dynamic between her and the senpai evolves, shifting from tension and resistance to a deeper connection. The senpai, with his playful yet commanding attitude, takes pleasure in teasing her, testing her limits, and gradually breaking down her initial resistance.
Each encounter becomes a blend of seduction and challenge, with the senpai pushing her to embrace the role with confidence and charm. From playful teasing in the office to intimate moments that blur the lines between work and personal life, the protagonist finds herself growing more comfortable with the situation—and with the senpai himself.
As the contract continues, the bond between the two deepens, and the once-formal relationship transforms into something more personal. The senpai, initially seen as a strict and demanding boss, reveals a softer side, showing appreciation for the protagonist’s dedication and willingness to go the extra mile. The story reaches a satisfying climax, where the initial pressure of the contract gives way to mutual respect and understanding, marking the beginning of a new chapter in their professional—and possibly personal—relationship.