Maryoku Mugen no Manaporter - Vol. 1 Ch. 8

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lol. they keep doing side quests. Himmel would be proud.

I think you mean "It's what the hero Himmel would have done."

 

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It seems that at this point the mangaka has abandoned any hope for a coherent storyline. I personally wouldn't be surprised if some random meteorite appeared next chapter and wipe out all the remaining monsters.
Or damage the tree further to tell us how desperate the situation is for the party. Lol
There is definitely some kind of boss monster appearing before the end of the fight which will also be defeated effortlessly.

Meanwhile:

Senpai is focused on taking a dump. Don't bother him girls.

I'm not sure what the mangaka was trying to portray with that but whatever it was, ye failed.