what do you mean by real love relationship? cause a couple characters have some date scenes and with Bernard I'm pretty sure if you get enough hearts he just outright says he loves us when we leave his shop.
if that's not what you mean, please give me an example and I should be able to tell you if it's in game currently, and maybe if it's in development. that's a maybe since I can't tell everything Hyao has planned and can only guess based off his posts and stuff lol.