Cynthia age should be little less like 6/7 years older
Normally in anime/manga, having a harem is considered with mc having 3 or more girls. MC will only have 2 wives in this story, so this is considered NOT a harem. 1 will be voted by you guys later. It being Cynthia is a possibility)
2. Harem? There will be a minimum of 3 permanent girls and maybe some flings. Suggestions? Not telling my choices though until I hear y'all's thoughts :p