Full Metal Panic! - Season 2 - Eps 5: The Pure Yet Impure Grappler / Trespassing on Good Faith
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 teach a stoic Sousuke the meaning of fear, Kaname takes him into a haunted hospital, but she becomes more scared than Sousuke. They learn that the haunted hospital rumor was perpetuated by the mother and son living there who wanted peace and quiet.
About Full Metal Panic!

Title: Full Metal Panic!
First Air Date: 2002-01-08
Last Air Date: 2018-07-18
Status: Ended
Rating: 7/10 (from 122 votes)
Language: JA
Seasons: 5
Total Episodes: 60
Network: Fuji TV WOWOW Prime AT-X
Genres: Animation, Sci-Fi & Fantasy
Production Companies: GONZO, GONZO Digimation, Kyoto Animation, Fuji Television Network
Synopsis
Kaname Chidori’s one of the most popular girls at her high school – unfortunately, it’s her growing popularity off campus she should be worrying about. Unbeknownst to Kaname, terrorists are plotting her abduction, believing she possesses the rare and coveted abilities of “the Whispered.” That’s where Sousuke Sagara enters the picture. He’s a hotshot soldier from the clandestine counter-terrorist organization known as Mithril – and he’s going undercover at Kaname’s school to try and keep her safe. He may be an ace in the cockpit of an Arm Slave mech, but there’s no training in the world that could prepare him for the warzone of high school.
Cast

Tomokazu Seki
Sousuke Sagara (voice)

Satsuki Yukino
Kaname Chidori (voice)

Michiko Neya
Melissa Mao (voice)

Rio Natsuki
(voice)

Shin-ichiro Miki
Kurz Weber (voice)

Mamiko Noto
Shinji Kazama (voice)

Ikue Kimura
Kyoko Tokiwa (voice)

Yukana
Teletha "Tessa" Testarossa (voice)

Tomomichi Nishimura
Cmdr. Richard Mardukas (voice)