Studio Blue

Kou, who had been living a dull life with no hope for the future, meets the charismatic Hee Bro. and regains the sparkle in his life. When Hee Bro. suddenly dies, Kou tries to find the definition of goodbye.

Underground people who exhale toxic gas appear in Tokyo's S-Ward, which is dealing with construction noise from urban development projects. Everyone panic, but it turns out that five middle-aged guys are unaffected by the poisonous gas. They undergo vigorous training to fight the underworld people, but are they going to be able to save the world…?