Chikai no Essence

Hero is the president and teacher of a prestigious girl academy with over a century of history. Both his father and grandfather found their love inside these walls. What students will arrive this year?
As you were returning from a walk...
"Nice to meet you, dear brother! I arrived one day earlier."
My intuition tells me: "This year will be a different year."
"We have not met for a long time, Arlise... I shall be your teacher."