I really like this manga, but wish there was more progression between the main couple before a female rival got involved. It doesn't seem like the MC and FMC's relationship is strong enough for her to get jealous over the new girl. The way it's been, the FMC should not care at all about the new girl and just let her and the MC get together. Maybe I'm just overthinking things, but it just seems too early in the story to introduce "drama" like this.