there is such a great disconnect from 31 onwards with the previous chapters, what the hell happened? what's missing?!
ok, i now know that there is another version of this with 60+ chapters which the chapter 31+ of this belongs to. to those that are yet starting go that manga
https://www.mangago.me/read-manga/the_diary_of_a_middle_aged_teacher_s_carefree_life_in_another_world/
let's hope that this is a better version
but sadly the plotline is nothing but garbage.
its quite apparent that the ml has the means to investigate why the mc never showed up.
instead, he wasted hid money to make a serum that changes hid beloved mc to an omega guess he's quite f*cked up that his brain is not braining anymore.
this guy has no redeemable quality aside from his physique and big dck.
so ill just read this for the smut. and skip the non-existent plot which could be easily solved with just asking "why".