If you're looking for manga similar to Ashita wa Doyoubi, you might like these titles.
It opens when a mysterious strangely dressed person who the kids mistake as a new transfer student enters a peaceful classroom. Much to their surprise he is their new homeroom teacher, among other things…
Takamizawa Shinichi has just transferred schools and is staying at the male dorm with his new friend Kato Masaya who is showing him around. He tells Takamizawa that he needs to pay his respects to Intel who oversees the male dorm housing. It turns out that Intel is a person who looks to be a pretty girl who seems almost machine-like. Although Intel has some human aspects, Takamizawa is puzzled by the truth behind Intel and, whether he wants to or not, he's about to find out more.
When Chinatsu joined the student council, she found it wasn't nearly as cool as she had expected. The president just slept all the time, and the vice president just did paperwork. There was no fighting evil, no sex appeal... just normal school stuff. It's up to Chinatsu to liven things up!
Mitarashi Dango was a typical otaku; his figures, dating games and other elements occupied his time. That is, until one day the boss of a strong gang breaks his favorite bishoujo figure, causing Dango to go berserk and beat him to the ground. After being unwillingly appointed to be the gang's new boss, Dango must now manage to juggle two lives: one as a closet otaku, and one as the fearful boss of a powerful gang. To prove his might Dango must compete in all kinds of sporting events and demonstrate his strength by lifting fifteen people with his power - the power he doesn't actually have!
A spin-off of Mitsudomoe, this series is comprised of single-page chapters that could not be published along with the original manga.
Imagine if an electric kettle, or a milk carton, or a coat hanger were a girl... Now imagine if two high school boys made these and a teacher found them... Follow six boys and girls on their delusional and hilarious days through high school.
Kadomatsu Shouta has just transferred to Takehana High, a boy's high school that's surrounded by four girls' high schools. It's rumored that students there have a 120% chance of losing their virginity before graduating, but when Shouta arrives, he finds himself in Class G: a class made up of delinquents, nerds, and losers! Girls won't give the Class G students the time of day, but Shouta won't give up on his dreams of getting a girlfriend without a fight.
In middle school, Watabe Fuyuhiko was a top student in grades and sports, and he was looking forward to a glorious high school life. Unfortunately, three idiots stand in his way. Morino Koharu is obsessed with studying, and surpasses Watabe in academics, but she's utterly clueless about everything else. Saotome Akira is constantly exercising, and surpasses Watabe in sports, but her self-worth is tied up with her skill in sports. Izumi Chinatsu, on the other hand, is an all-around failure that simply gets in Watabe's way. Watabe interacts with Morino and Saotome to learn their secrets, and ends up paired with Izumi against his wishes. The three girls are all lonely and friendless, and interpret his interactions as friendly overtures. It looks like Watabe's school life is going to be very different than he imagined!