It is the after story of “KIMI NO SHIAWASE WO NEGATTEITA” Aka “I wish you happiness”.
Be aware, it’s not a happy ending yet.
An old family friend appeared in front of Wakaba, who was starting a friendship with Sasanami.
When he felt the most lost and couldn’ find his way, Raizo-san points to him another path to take.
Still, Wakaba couldn’t decide which way to go.