Takumi, who has started his career and Shinobu, who is still a student quarrel again one morning when Shinobu insists on having everything his way. Yuta cries between his two friends. Soon after, one day Professor Hanamoto suddenly comes back from Mongolia without notice. Although he is back in town, he is very busy with his remaining work and can't spare time for Hagumi. When Hagumi needs to go shopping for art supplies, she goes by herself with Shinobu. Yuta sees them off, unable to intervene. Feelings are slowly entangled.