If you're looking for manga similar to Sanbiki no Kobuta no Koutsuu Anzen, you might like these titles.
Includes the following chapters:
This is a story about the Over-thinking pig with his frustrations with love, his suffering, and how he eventually tries to cheer up. Of course, while we watch and laugh at his bitter experience, we simultaneously recognize his circumstance in our own troubled relationships. Only when we can understand how feelings change when in love will we find true happiness.
Featuring an alternate universe where running, playing, and Hanja (Chinese characters used in the Korean language) are banned for safety reasons, and the country's temperature is rising due to a volcano. With the help of elders that were champions in the past, a group of courageous Cookies go to collect pets and learn Hanja.