Is Less Than a Stranger - Dear and Annoying You coming back?

The day her first crush became her "older brother," Kiyoka's faint feelings of love as a child were quietly contained. With a nameless love in her heart, Kiyoka continued to gaze upon her "older brother," Fuuto. However, Fuuto had other plans. While celebrating his engagement, an incident suddenly occurs that shakes the house. The threads of fate that intertwine the two, who can no longer become strangers, will eventually tear them apart.