がんばれ!小傘ちゃん
Artist: yuzuna99
Slice of life 4koma series about Tatara Kogasa.
Not to be confused by Mizuki Hitoshi's series (がんばれ小傘さん, pool #2420), which is a diary series with the artist as Kogasa.
Neither to be confused with Warugaki's doujin series with a similar name. (がんばれ!(泣)こがさちゃん!! (Hang In There! (Sob), Kogasa-chan!!); pool #1314, pool #4464, pool #9395, pool #11180, pool #14067)