If you're looking for anime similar to Koredemo Manga Kenkyuubu: Line 4-koma, you might like these titles.
Nakki is a girl full of energy and a torment to her new teachers. She lived with her grandparents and come back to her home, to her weak and sick twin sister and a new school. We are invited to follow her daily life with her firends in the happy and painful process of becoming an adult. They discover that friendship is the most valuable treasure they can have in their lives. From student to teacher, from a girl to woman, we go with Nakki.
An image video, setting watercolors from Yumiko Kawahara's 1983 manga to a series of 11 pop songs.
X² is basically a short prequel to the theatrical X film. It consists of four music videos. The first three are merely stills of CLAMP's pre-1994 X artwork, but the fourth is animated by Madhouse. Being the only music video that contains actual plot, the fourth video introduces some of the major characters and quickly lashes through the first few X manga (equivalent to X TV series episodes 1-3) which take place before the theatrical movie.