Dunno why people complaining about "SRS" - i guess back in a days, when we used SMS messaging, i guess it was pretty common to use that kind of "acronyms", am i wrong?
And yea, this chapter... Really dangerous. Poor Ichikawa, i can understand him. Especially when you're spending time with most popular girl in class (and you're... well, in the bottom of school hierarchy), odds will be against you. No wonder why he reacts like that.