I feel it was a bit played for laughs there at the end but I can't help but grow increasingly worried about Shirogane. The way he conducts himself in regards to his studies and work that even requires a caffeine addiction to keep up is a bit disturbing. I don't know how serious this manga is so maybe they won't delve too deeply into this and it'll just be one of those background things to poke fun at and stuff, but it does worry me and makes me wonder what will come out of this if it's not thrown to the sidelines, because it doesn't seem anywhere near healthy or sustainable although apparently it's nothing new so he's probably been at it for a good long while.