Masunaga Haruki is a single father struggling to balance the demands of raising his young son Ritsu with his career. Constantly feeling the pressure to do both perfectly, he finds himself overwhelmed and exhausted. During a work-related interview, a comment from his colleague, Endo Chiaki, unexpectedly brings him a moment of relief. However, the situation takes an unforeseen turn when Chiaki, who lives next door, offers to help Haruki with childcare and housework based on his own experiences. What Haruki did not know was that the neighbor he once saw kissing a man is actually his coworker from the office. Their connection begins quietly across their balconies, leading to a tender and bittersweet love story. As they spend more time together, Haruki begins to develop special feelings for the devoted Chiaki. Their budding relationship is tested when someone claiming to be Chiaki’s sexual partner appears, threatening the bond between the single father and his dependable neighbor. The manga follows the emotional journey of the serious, stoic salaryman Chiaki and the hardworking single father Haruki as they navigate unexpected romance and family life.