This is a gag manga.I love trash manga but this is starting to get a little too stupid imo.
i honestly think there's a higher chance his sister or some random unnamed maid is behind this ploy than lucan himself. boy is as dumb as a sack of rocks being used as a floatation device.I'm gonna go with "this is actually a ploy by Lucan against himself, to get Haru to be on the case + feel bad for him getting attacked so he can get closer to her", or something dumb like that. He's noble knight lineage, so he could probably get the info from the investigation by using some connections.
You know exactly what I mean.This is a gag manga.