After returning from maternity leave, Shion struggles to balance motherhood and work. However, her husband neglects the family, leaving her father-in-law, Tohru, as the only person she can rely on. Drawn to his warm, comforting kindness, Shion gradually loses her heart to him. Exhausted from constant arguments and conflicts with her husband, her relationship with Tohru becomes her sole source of solace. Ignoring the watchful eyes of others, the two secretly draw close, sharing quiet moments of physical intimacy and emotional warmth. Though Shion knows their affair is wrong, she finds herself unable to stop as her feelings for Tohru grow deeper each day.