With their parents away on vacation and no one to look after him, Alan is sent to stay with his current teacher.
By chance, Alan discovers: Wait, Teacher Levi was actually my childhood playmate?
His mother says, "That's right. When you were little, you were always clinging to Levi and calling him 'Levi, Levi'~"
And so begins their life together!
Why don't you update it? . .
Author, have you given up?(