If you're looking for manga similar to Gun to Onee to Satsuriku Heishi, you might like these titles.
Takaaki waters a certain flower pot by chance. A small man who slept a thousand years inside the sprout comes out and needs to adapt to the new world. And to win Takaaki's heart, of course.
I'm Nakabori Ayu. My family runs a fish store on the Fujikubo Kotobuchi Shopping Street. You may be thinking that something like this is merely plain and ordinary, but actually, there's another fish store directly across from mine. Our families compete for business, and the arguments between our fathers are never-ending. Coincidentally, Hinai Fresh Fish Store's son, Daisuke, is the same age as me. I really wanted to establish a good friendship between the two of us. However, it left me with a deep truamatic mental scar...
Little Rice-chan (guy the size of a bug) has fallen in love with a human boy who adores him and moved into his familiy's home, which is strange enough especially for the family that has to look on! Then all of Rice-chan's other suitors and associates show up! For some reason EVERYONE loves this little guy!!
Keiki is the son of a baker that owns his own bakery. After one of the workers of the shop takes a leave of absence, the new workers recommended by her is an irritating boy that calls Keiki “Cake”. Problems begin to arise when Keiki’s father runs away with one of female waitresses…
Kouki Hanashima and Asahi Hidaka share a class-recognized love, although it's a relationship that seems to have its ups and downs. One day, out of nowhere, Kouki's older sister pushes her young infant son on the couple, saying that her duties as a stewardess requires her to be away for a month. Not only is the child named Asahi as well, but it seems that he's becoming a rival for the older Asahi!
Love and Diamond are an android hero duo known as "Super Double." Their days were filled with battles, until one day they run out of energy and lose consciousness! Salary man Jiro picks the two up, and...