 If you liked Watashi ga Motenai no wa Dou Kangaetemo Omaera ga Warui! |  ...then you might like Shino-chan wa Jibun no Namae ga Ienai |
From both manga series, there is a very shy girl who is considered an outcast and finds herself difficult speaking to others and making friends. This is often portrayed in a humorous and sometimes exaggerated way. Both manga titles offers a slice of life feeling involving the main girl and what she does. Both manga has a school life setting. They both also have a lot of funny dialogues and humor.