Highschool Terra Story (ハイスクールテラストーリー) is a Simulation - Dating game, developed by Success / Uran / KID (Kindle Imagine Develop) and published by KID (Kindle Imagine Develop), which was released in Japan in 1998 for the Sega Saturn.
https://www.satakore.com/sega-saturn-game,,T-19715G,,Highschool-Terra-Story-JPN.html