The art of this is awfully pretty (the faces are so lovely) and the story is sweet and fluffy - except for that 10-year age gap, with one party being a high schooler (they stay together through his university admission and further). The student is a great character and quite the ideal man, and the mangaka acknowledges his youth as well, showing his immature sides, like his insecurity and jealousy. This was a cute story!
Toshishita Kareshi ni Hirowaremashita