Toradora!

Ami takes refuge in Taiga's apartment in order to avoid a stalker but is forced to impersonate people in strange situations. Yuusaku asks Taiga and Ryuuji to be better friends with Ami since they know what type of person she really is. Taiga volunteers herself and Ryuuji to take part in the student council's monthly neighborhood cleaning rally, and Minori and Ami come along too. After Taiga and Minori leave together, Ami and Ryuuji hide from the stalker. When the stalker tries to take photos of Taiga, she gets angry and chases him down. Empowered by Taiga's actions, Ami decides to discard her fake personality. She chases down the stalker and destroys his camera. The stalker runs away in fear. (Source: Wikipedia)