After recently moving into a new apartment building, Yui Hanasaka pays a customary visit to greet her neighbor. Upon learning that he is an upperclassman at the university she hopes to attend, she asks for his assistance in passing her entrance exams. Meanwhile, Natsuki Momohara decides to visit her older brother, who lives alone in a Tokyo apartment. Elsewhere, aspiring singer Moka Aoshima reunites with her childhood friend, a hopeful novelist. Three stories, though seemingly unrelated, share the same essence: strings of fate will bind together those who share the same destiny, and one needs to look no further than a single apartment room.