Zero no Tsukaima: Ko-akuma to Harukaze no Concerto

Saito is summoned to the another world, and gets involved in "Love" and "Adventure". Staged on Tristheine Magic School, he is teased and loved by Luiz. Luiz has the likeability parameter and dislikeability parameter.
If you hang around with other girls, her dislikeability parameter rises. And if it hits the limit, a horrible event happens to you.
Keep an eye on them all the time, and have a love-love life with Luiz.