Hikigaya Hachiman, who seems to be singing the praises of "living alone" under the psychological shadow of the past and his own twisted thinking circuit, was accidentally led by the life guidance teacher Hiratsuka Shizuka to join the "Service Club". Together with the breathtakingly perfect beautiful girl Yukinoshita Yukino who belongs to the same club, and the fashionable girl Yuigahama Yui who belongs to the upper class of the class, he spends every day solving various incidents, from solving interpersonal relationship problems in the class to helping the student council. The seasons pass, and it is spring. Hachiman and Yui accepted Yukino's last commission. In the process of preparing for the graduation ceremony in March, Iroha also asked him to help with the graduation dance...—— Hachiman, who pursues the real thing, gradually changes his relationship with the three people. What will be the ending of his high school life! ?