Oh boy! That is some birthday present if ever i saw one. I kinda afraid read next chapter now.
Damn this is really good when author doesn't try to force harem shit with some irrelevant background cliche characters.
I knew it, just as I was starting not to suspect those phonecalls and starting to think bat she's decent and feeling bad for her for mc's unfaithfulness, i fuckin knew it FUCKIN NTR