Lavinia is sprawled on her bed fucking around on her phone before going to sleep. 

There's an ad that claims to isekai you if you stare at it for a few seconds. Lavinia is very sure that it's going to turn into an ad for an isekai-themed game or story or something when the timer runs out, but the premise is, in fact, amusing enough to make her look at it long enough to see the timer tick down to zero and see whatever it's going to actually advertise.