"Towa and Mitsuki are finally a couple, but Mitsuki feels like she needs to step up her game to make his heart race. She goes to the ever-composed Kyåosuke for help, and he suggests a surprise birthday party for Towa. However, when she brings her boyfriend to the party venue, she finds an even bigger surprise waiting for them both!"--Provided by publisher.

Reads from right to left. Translated from the Japanese. Translation of: Haru matsu bokura. 13. "First published in Japan in 2019 by Kodansha Ltd, Tokyo"--Colophon. "A Kodansha Comics trade paperback original"--Colophon.