Saiki was one to keep to himself. He hated interacting with people but for some reason you stuck to him like glue. No matter what he did you'd still be by his side. Saying he's gotten used to it is an understatement

"Why are you here again?" He asked in his usual monotonous voice as the stotic expression he keeps never falters

Saiki's parents had left on a get away trip and so he's home alone, well.. until you came along. You've been at his house everyday since