Chuu Bra!!

Both main characters are obsessed with a certain thing, and that is all they think about 

Both are school comedies about unusual club activities. In Love Lab, the club is focused on learning romance fundamentals, while in Chuu Bra!!, the club is about appreciating underwear. In both, one of the characters has a father figure who designs underwear. Surprisingly, Chuu Bra!! actually has a larger focus on romance than Love Lab, while Love Lab has more comedy. 

Both have a very similar superficial concept about the creation of a club but underneath lies a deeper and more interesting story with cute characters. 

Both shows are comedies with a large focus on underwear. One character in each show is obsessed with underwear and it is also significant to the plot. 

Group of growing-up girls and their troubles and questions regarding the growing up process. 

Both have a couple of girls, who become friends. Although Yuru Yuri is more of a comedy slice of life, Chuu Bra has a bit more of a plot, or a story, but both are comedy and have shoujo ai in it. Yuru yuri more of it (in every episode lol). Both recommended. 

LOLICON biiig time and both have young girls talking about mature themes  

Both Onimai and Chuu Bra feature cutesy comedy with a good amount of sex jokes, but both also describe personal care for girls. Onimai is more general, featuring self-care, hygiene, clothing choice for both fashion and bodily support, and gender identity. Chuu Bra is more specific, going into detail about the function of bras down to their individual parts, as well as preconceived notions about them for both the girl wearing the bra, and how society views them. Both bring up uncomfortable and sexual topics in comedic ways, but also try to frame them as educational for both viewers and the characters. Still, don't watch either with family in the room. read more 

Both shows are about a girl trying her best to make a new club in her school. While the clubs get rejected a few times at first, neither girl gives up!