Squid Girl (2010)

S2E7 Care To Squidertain Our Guests!? / Ink That Amnesia!? / Your Porpoise Joining the Club!?

Ayumi's father extends a dinner invitation to the Aizawas, but his unconventional hospitality leaves Squid Girl and Eiko feeling distinctly uncomfortable. A tumble down the stairs later wipes Squid Girl's memory clean. While her friends attempt to fabricate recollections for her, she suddenly regains everything when she struggles to remove her hat, causing her life to flash before her eyes. Afterwards, Squid Girl launches an 'Invasion Club' with Kiyomi and their friends, staging raids on various locations. When Kiyomi falls ill, Squid Girl frets over the club's fate, prompting the group to visit her and stage an invasion of her home as well.