Cleaner's whole schtick is cleaning, right? When people try and fight dirty, Cleaner has the upper hand! I like to imagine this means he would lose to a child, but people keep being jackasses so he keeps winning lol.
Parents live a hard life and then spoil their kid, kid gets grumpy in their spoiled life lol. Tale as old as time
Hmm... Yuseong doesn't want Dojin to meet someone troublesome... Calling it now that there's a female love interest in the novel for Dojin, and Yuseong is bumping them apart hahaha. BL fangirls intensify
That translation is all over the place but basically she is shocked to be given 100% of profits even though her dad is helping. She was initially misreading it as 10% and thinking oh 20% would have been nice, oh well. But then she notices there's an extra zero, and tells her dad he's being too generous.