If you're looking for manga similar to Tick Tack, you might like these titles.
It’s the year 2038, but more importantly, it’s summer. A little boy named Yuma is obsessed with the impending return of the Arville Comet. Then, one day, he sneaks onto the roof of an apartment building and finds something even more amazing—something not from this world. Now Yuma and his friends, and his hovering autopet Nanako, must work together to uncover a secret that’s slumbered in the Earth for years, as dawn breaks over a new era for him and for humanity…
Natsuru Nanao, a 6th grader who lives alone with his mother, strikes up an unlikely friendship with the reserved and driven Rio Suzumura. Natsuru plays hookey from soccer camp that summer, and instead of telling the truth to his mother, he spends all his time with Rio and her kid brother at their rickety house, where a dark secret threatens to upend their fragile happiness.
In the distant future, humankind lives shoulder-to-shoulder in a cramped "Colony" divided by bedrock. Outside the colony extends a dangerous undeveloped area known as "The Labyrinth." Those who risk their lives to explore the Labyrinth and mark undeveloped areas are known as "Markers." Memempu is a young girl who wants to become a Marker, and Gagumber is a man who quit being a Marker. This rag-tag father and daughter team are about to take on the Labyrinth! "If there is no path, then dig one!"
Girls in their 4th year of primary school discover what puberty is, and what it changes in their minds, but also for their bodies.
Tsubomi Tachibana, fifth grader, is dealing with issues such as her mother's pregnancy, her first period, and the strange feelings she has started to get when she has been around boys.
In a town where a lot of stray cats live a carefree life, there is a child who lives among them. His mother suddenly disappeared one day, and that abandoned kid found a white cat who had also lost her own children. Now, he's watched over by the townspeople and is living with his new mother cat like a real family.
The twins, Aoi and Akane, have been living with their grandparents from their late mother's side and their father. They are now fifth graders and are about to start taking steps towards life while embracing new encounters and new experiences on their own.