From what it was shown, Howoo's mom worked as a maid at Yool's house. Yool and Howoo became friends kind of and then one day Yool's powers exploded, it killed his parents and Howoo's mom I think.
Holy shittt
That escalated quickly
Yeah.. sort of.. but I won't blame him.. he was a 9 yo whose parents kept fighting bc of him and were too scared of him to be around him.. Howoo was the only friend he made.. what happened to Howoo's mom was just an unfortunate accident..
So seme meet uke as kids? or that day that he save him? and then somehow made him into a guide unnaturally so now he's like sorry i kept it a secret the reasoning is uh he didnt want uke to be under experiments anf all that stuff like he did so yeah oof so pretty much ml just loves him a lot but like wasnt honest since the start thats rough to swallow for mc