Full Metal Panic? Fumoffu

A secret admirer leaves a love letter in Sousuke's shoe locker. Instead of finding the letter, he deduces that his locker was tampered with and promptly blows it up. From its fragments, Sousuke misinterprets the letter as a death threat and confronts his "stalker". A Hostage With No Compromises: After Sousuke's encounter with a gang leaves its members disrespected, their leader decides to take Kaname hostage. Instead of giving in to their demands, Sousuke holds the gang leader's little brother hostage and proposes an exchange

After Sousuke causes a panic at the school's bread stand, Sousuke and Kaname have to fill in for the stand's lunchtime duties, which raises the ire of the physical education teacher. He attempts to sabotage their bread, but he falls for Sousuke's booby traps, when Sousuke was expecting that someone would tamper the bread. A Fruitless Lunchtime: Sousuke forgets Kaname's notes at home and they make a frantic dash to retrieve them and return before lunchtime ends. Despite their tardiness, they find out that the notes were not needed since their teacher coincidentally fell sick.

During a day at the beach, Kaname becomes upset at Sousuke's insensitivity. When she goes off alone, she is asked to have tea with a boy who is enamored with her. Sousuke, however, believes that she was kidnapped and proceeds to rescue her from her apparent kidnappers.

During a field trip to the park, the class selects Sousuke to be the model for their art project. However, Sousuke misinterprets the modeling advice he receives from their art teacher, turning the assignment with his classmates into a game of life-and-death.

Sousuke and Kaname ask the school's karate club to vacate their dojo, which is slated for demolition. However, the club refuses to leave, challenging Sousuke to a duel where they'll leave if they lose. Sousuke defeats the club's members with relative ease until he faces the club's captain.

Sousuke and Kaname investigate bizarre incidents where a masked predator attacks schoolgirls and gives them ponytails. With the help of a local policewoman, they set up a trap to catch the attacker using Kaname as bait.

To prevent the school from disbanding the rugby team, Sousuke and Kaname help train them for an exhibition match against a rival school. Upon discovering that the players are timid and passive, Sousuke subjects them to grueling basic training to toughen them up, which helps them win the match.

Tessa decides to spend the time as an exchange student at Jindai High to learn more about school life. Sousuke, however, finds the stress of guarding her overbearing and collapses from fatigue.

Sousuke, Kaname, Tessa, Kurz, Melissa, and their friends travel to an onsen (hot springs) for some rest and relaxation before Tessa returns to Merida Island. Sousuke sets up a defensive perimeter and booby traps around the girls' bath, foiling the other boys' attempts to sneak a peek.

Sousuke and Kaname discover that Ren Mikihara is a yakuza daughter whose members ask for their help to deal with a rival gang. Sousuke, in his mascot disguise, trains the yakuza members. When the rival gang kidnaps Kaname and Ren, Sousuke and his recruits rescue them wearing the special mascot AS

A lack of space for all of Jindai High's student organizations prompts a review of each group's numbers. Because they only have two members, the social science club agrees to give up their room through a contest to see which club can recruit the most members of the opposite gender. Sousuke participates, but his poor social skills fail to attract anyone to his club. Kaname, feeling sorry for Sousuke, decides to help out so he can avoid a bet he made with another club.

A classmate accidentally opens Sousuke's biohazardous container, causing a classroom quarantine. Sousuke later learns that the contents were not pathogenic, but destroys synthetic clothing instead. Relieved that there is no outbreak, he now fears the repercussions from his angry classmates.