Sakana no Miru Yume

After their mother's death, two sisters, the older Tomoe and younger Mikage, have largely taken care of each other. Tomoe is focused on achieving high academic success to secure a place in a reputable college. Mikage, however, often causes her trouble. Early in the manga, Mikage secretly places a collar around Tomoe's neck, making her wear it throughout the day. Mikage's actions suggest a desire for Tomoe's undivided attention, possibly extending beyond typical sibling affection. Meanwhile, at school, Mikage has formed a new friendship with a girl who has strong feelings for her. While the sisters attend different schools, their shared life and relationship remain central. The manga includes four additional chapters.