A friend of mine has been postponing watching the movie......what do I tell him?

A friend of mine was telling me about how he watched this anime he refuses to finish. When I asked him which anime, he said "Quintessential Quintuplets." Finally a fan appeared in the wild. We watched the series at the same time, except he never finished it.

I asked him if he read the manga, he said no. I asked how far he was with the anime and he said he doesn't want to start or finished the movie. He watched episode 1 of the first OVA after I suggested to him that he should (sticking to my guns to watch the second episode post movie). He refuses to watch the movie but I think it's a valid point to at least read the manga just before the events of the movie.

Any suggestion welcome because he really does enjoy the series.