Rud is a tank of the Hero's Party and is said to have the highest defense ever in history. The party often does labyrinth raids, but to Rud, it means more than just a raid. To cure his beloved sister's illness, he is in search for the wish-granting treasure that might be hidden in those labyrinths. But one day, the arrogant hero kicks him from the party after an unsuccessful raid attempt, blaming it on his skills whose effects he is still unaware of. With nowhere else to go and nothing to do, he decides to return to his hometown, where his sister is waiting. On his way there, he saves a girl who was being attacked by a monster. Unexpectedly, this girl has an extremely rare skill called "Appraisal." Thanks to her skill, Rud is able to discover the truth behind his unknown skills, which turn out to be very powerful skills. With a defense of 9999 and powerful skills, thus begins the adventure of the strongest tank, Rud! (Source: Square Enix)

With a smirk, Oota disregards his single-digit test scores and searches for a new source of amusement. He is soon captivated by his classmate Kashiwada, a mysterious student who consistently wears a blank face. Oota conspires to break her placid demeanor through scares and mischievous schemes, though his tactics always seem to backfire. Oota is known as the class clown and is constantly disciplined by his teacher, who claims "his face gives it away." To no fault of his own, he lacks control of his emotions and facial expressions. Kashiwada, on the other hand, seems perpetually emotionless and unreadable—no one knows what she is thinking! Oota and Kashiwada are complete opposites, but that does not stop a unique relationship from developing between them. As they realize their feelings for each other, it raises an important question: do opposites really attract? [Written by MAL Rewrite]