Reaching for you

FOR HP KINKTOBER 2023.
Set after the war, Severus returns to his post as Potions Master, and he and Harry start a friendship that develops into something much deeper. Harry is Little, and Severus becomes his primary caregiver. But over the summer, Severus is busy, and he leaves Harry with the Malfoys, who act as nanny for him. After a few days of being left during the day at Malfoy Manor, and with no cuddles from Severus at night because he's tired and short on temper, Harry is sure he's a burden to Severus.
In his little state, at Malfoy Mannor and with no wand, Harry flees and apparates at the Burrow.