Raku completes all the ridiculous assignments Hana-san gives him so efficiently that he manages to save three whole hours in her to-the-minute schedule - all so she can spend some time with Chitoge. When she still hesitates he karate chops her and calls her an idiot - and this is a woman so scary even her own husband who's a mafia boss fears her. When Raku puts his heart into something he's badass.
To top it off, this badass succeeds.
One of Beehive's wacky inventions is gummies that can cause a person who ate them to fall in love with first person they see. Marika however, took one and just merely confused with her feelings.