Chapters 3 to 12 detail the deepening domestic life and emotional bond between the protagonists, Shin and Yuu, while introducing significant internal conflicts and world-building elements.
The narrative begins with a warm morning scene in December, establishing Shin and Yuu's affectionate relationship. Shin, the kind and gentle male protagonist, is playfully woken by Yuu, his loving girlfriend, who has prepared breakfast. Their interaction is lighthearted, with Shin jokingly asking for "five more minutes," which Yuu, with her sweet and caring personality, indulges. This daily ritual highlights their comfortable cohabitation and mutual affection.
Following Shin's departure for school, the perspective shifts to Yuu, revealing the depth of her attachment. Yuu, who is deeply in love and prone to intense longing, feels profound loneliness in Shin's absence. She reflects on their recent transition to "lovers" and cherishes Shin's growing comfort and trust in her, evidenced by his newfound playfulness. Yuu's thoughts reveal a past "terrible thing" she committed, for which Shin forgave her, solidifying her intense devotion and fear of losing him. She openly acknowledges her "heavy" love, wishing for time to pass quickly until his return.
The central turning point occurs during the night when Shin wakes to find Yuu trembling in his bed. Yuu, overwhelmed by fear, explains she experienced vivid, disturbing dreams. These dreams, which she later suspects are manifestations of her "dream-seeing ability" from her past as a "Saintess," depicted various "bad endings": Yuu leaving Shin after erasing his memory, or Shin becoming close to other women while she remained a mere "friend." Shin, recalling his own childhood fears, offers profound comfort, gently stroking her back and reassuring her with unwavering love. He declares, "Yuu, as long as you're here for me, that's all I need," a statement that deeply moves Yuu and alleviates her terror.
The chapters conclude with Yuu waking up in Shin's arms, feeling immense happiness and security. Despite the unsettling nature of her dreams and the re-emergence of her supernatural ability, Shin's steadfast affection provides her with an anchor. This arc transforms their relationship from one of domestic bliss to a deeply intertwined bond, where Shin acts as Yuu's emotional refuge against her past burdens and newly discovered supernatural anxieties, setting the stage for future explorations of her Saintess identity and dream powers.