Watashitachi no Tamura-kun follows Yukisada Tamura, a junior-high third-year entranced by a girl, Komaki Matsuzawa, claiming extraterrestrial origins. After Yukisada's heartfelt confession, a tragedy separates them. Despite a brief letter exchange, Komaki goes silent during high school prep. In high school, Yukisada befriends Hiroka Sōma, a classmate struggling with past bullying. Standing by her side, Yukisada's kindness sparks Hiroka's affections. Meanwhile, Yukisada's connection with Komaki remains, leading to a pivotal inquiry about Hiroka. A poignant side story delves into Yukisada's friend, Shinichi Takaura, guiding his love-averse half-sister, Io Tamai, towards understanding love and social bonds.