@goarachnidlaser From what little I know (so take this all with a grain of salt), the way I understand it is that it's still pretty uncommon for there to be multiple PCs in a single household in Japan, so it's probably safer to have physical books that only overzealous parents would find, as opposed to storing it on a shared computer where it's much easier to find.
This just keeps escalating. Last chapter, hand-holding. This chapter, forehead-touching. They need to pump those brakes or somebody is getting pregnant. I don't think Senpai can carry a child to term with that bean sprout body!!
Incidentally. PLEASE have his mother come back early and find Nagatoro in his room.
Nagatoro will DIE of embarassment And she will be super worried of making a good impression