Noah Garden

There is only one huge continent on this planet. Originally there was only one nation "Loxen", but it collapsed into five empires. Magic prospers as it can substitute anything that science can produce. But still lost knowledge technology artifacts can be found in the ruins.
Hibiki studies at Tenmai school with childhood friends. They will need to overcome multiple challenges in this world of turmoil divided between five nations.

[From vndbreview]