Kotaro Lives Alone Episode 4

Some light has been shed on Tamaru's storyline and we got to see a glimpse of his sensitive side. There was a Kids's festival at Kotaro's school, which has helped revealed to the viewers that Kotaro is more attached to Karino that he wants to admit. A new neighbour living on the first (ground) floor for a short period of time introduces himself to Kotaro and Karino as Aoto. But with him knowing Karino's and Kotaro's names before they introduce themsleves, is there more to this man that meets the eye? (Source: Annie at MyDramalist)