Shiori and Ritsu grapple with their true feelings as they imagine how it would feel in a same-gender couple with Hinase. To both their surprise, they learn their other classmates have more complex views on romance and gender than they thought. A chance meeting with Nao, the woman who saved Hinase's life, leaves the trio with a mystery: Who is the androgynous older figure in her photograph, and are they still alive?

Volume 4 of the Just Like Mona Lisa manga series by Tsumuji Yoshimura.