Series: Mahou Shoujo Madoka Magica - The Christmas Witch (Ayanero Taicho)

Original title: クリスマスに魔女
Artist: Ayanero Taicho
Source: pixiv #25061185

Mami finds the office lady she saved in episode 2 of the series, crying in the street over a ruined cake. Stuff happens, and they go all lovey-dovey.