Hayate the Combat Butler (2007) : 4x8

Astonish to gaining weight, Ayumu efforts to preserve her health. Following at Café Donguri, Hayate gives Ayumu some Nikuman he made, at that moment, she realize her constant consuming of Hayate's food is the reason she's gaining weight. She stops herself from eating, but just couldn't resist Hayate's generous offer. In a flashback, Ayumu remembers how everyone prepared a surprise birthday party for her. Hayate was baking cookies for her, Maria questions who else's birthdays does he know, answering he remembers everybody's. Nagi and Chiharu compromise they should throw a surprise party for Ayumu over at Café Donguri. Before they can start setting it up, Ayumu arrives already! As she attempts to remind them what "today" is, they try to avoid the question by feigning ignorance until she gives up. Ayumu finally leaves after part-time and everyone quickly prepares the party. Nagi calls for Ayumu's return, but she is too dismayed, so Nagi use a sympathetic manner to convince her.