"Again to Love" is comprised of very little more than the minimum elements to compose a romance. Extremely low character count with not much personality to go around; a single plot-line that runs mostly without conflict; dialogues that work surface-level and with little nuance; scenes that are almost always mono-thematic; and practically no character development to speak of. I will expand on each issue and the do a summary at the end.
As far as the reader is concerned, there are only four characters in this universe. One of them is highly secondary, adding very little to the story. The other three unknowingly see themselves involved in a love triangle. This triangle is strongly and fortuitously interconnected: Idunn (an exchange student) wants to be with Will (her hostess son), Will wants to be with Idunn but used to be with Theresa (who wants to be back with him), Theresa is tutoring Idunn and pushing her to date her ex (unknowingly). That it, nobody has any friends or relationships outside this triangle except for Olivia, who is both mum and hostess, and Theresa, who by the end finds another date. Idunn a couple of times talks to or about her family, but they shine by their absence both physically and of relevance. Furthermore, this characters don't present much in terms of personality, except maybe Theresa, who is very forward sexually and prone to sudden anger attacks. Yet the little they do have sometimes get contradicted, as the somewhat shy exchange student presents itself as very fiery by the end, both sexually and socially, without any explanation for the change other the fact that she had sex. I would recommend you populate the script a little bit more and find personalities to tie to the characters, ideally related to the plot.
There's basically one plot: the aforementioned love triangle. No character has anything else going on in their lives. Moreover, this plot runs without any real conflict until the 70% mark of the movie, where the fact that there's a potential triangle is revealed. Before that, scenes just put forward two characters meeting each other. One could say getting to know each other, if there's was anything to know, but this characters have almost no background and the little they have, as Will's father dying not long ago, doesn't seem to affect them in the present. After the conflict manifests, it gets resolved immediately. I would recommend, keeping along my first recommendation, that you put in place secondary plots, giving characters more to do, and also have their actions informed by previous events in their lives. Maybe Olivia is moving on with her life and starts dating, maybe that affects Will somehow, maybe Will is emotionally distant after the death of his father and not completely over, maybe that is what caused the breakup so there is a reason to consider getting back together. At the same time, the main love story needs a proper conflict from the get go. Maybe Will is emotionally distant, or Idunn doesn't want to get involved as she is supposed to leave back to Iceland soon, maybe reveal the triangle a lot sooner and find ways to take advantage of it more. "Will they? won't they?" is not present here and should be the core of the plot.
Characters usually just put forward exactly whats on their mind without nuance. There's almost no subtext to the lines and no conflict appears from characters misspeaking. I would recommend to get your characters talking about other subjects of interest to them and in more obtuse ways, get some lies in there, get some confusion, get some verisimilitude.
Scenes work almost entirely to get some information to the audience or forward the meeting of the main love story. A particularly worrisome case happens on page 6, where Theresa enters the coffe shop and talks to Will just to tell the reader that they know each other and that she is taking on an tutoring, which is immediately after revealed to be Idunn. I would recommend you work in the scenes all my previous recommendations about additional plot-lines, conflict, background, interest.
Characters, since they don't have hurdles to get over, don't develop. The only reason Will and Idunn don't immediately start a relationship is that they don't know each other enough. But then they go to a couple dates and the relationship starts. The one point that could've been of conflict, their interrupted first kiss, just gets brushed off as, the next time they meet each other, this is not mentioned at all. They need individual reason not to want to date the other one, twisted reasons that they eventually surpass to do what their heart tells them to do. And therefore grow.
In conclusion, characters should have personalities, personalities should be tied to their backgrounds and inform their dialogue; plot should have conflict and related sub-plots; scenes should involve all these levels. This is the bare-bones of a love story. But the bones are there and are good enough. Now you need to add all the meat, so that it feels like a rounded story.
