The Angel Next Door Spoils Me Rotten, Vol. 9 (light novel)

A BUNCH OF BIRTHDAYS. When Amane turned a year older, he realized with happiness just how much had changed in his life thanks to Mahiru. With her birthday approaching, he gets busy planning to give her just as many blessings. As the two start thinking about their future, they dream of a life together and make a promise to work hard on their college entrance exams. As Mahiru's special day finally arrives, Amane has prepared a surprise he hopes will make it a truly memorable day.