If you're looking for manga similar to Hanamaru Koutsuu Anzen, you might like these titles.
A full-color manga based on the illustrated book series Wakeatte Zetsumetsu shimashita. (published by Diamond). It's an educational comedy, featuring a number of extinct creatures that have been turned into beautiful boys for a variety of reasons.
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.
The comic tells the story of the first game, with Sonic traversing across South Island and rescuing his animal friends from Dr. Eggman.