Story:
I find the initial plot of Why R U really interesting. But I realized it was more than that. It was amazing. Some of my expectations were subverted since it avoided some bl tropes. The development of and between the main characters were great, although I myself had to "fill in the gaps" for Zon and Saifah' development because of the lack of scenes due to COVID-19. Also, once I tried to analyze Zon's character, I find that what he felt were realistic and his actions in the series were justified, especially in the last episode, and that really made his and Saifah' moments there special. Tutor and Fighter had more scenes, especially Tutor, which made me really sympathize with his character, which frankly also made his relationship with Fighter more heartwarming(and heartbreaking at some points). However, I do find some stuff to be rushed like Fighter and his dad, Day and Hwahwa(I am happy for that story arc though), and the relationships in the football club.
Acting/Cast:
Saint, Zee, Tommy, and Jimmy were all amazing. There wasn't much about Jimmy's character though, which was a bummer. Saifah was just there as part of Tutor and Day's friend group and Zon's significant other. However, Jimmy as Saifah delivered what the story needs him to. His respect for Zon's feelings were really expressed as well as his feelings. Tommy as Zon was great. He and Jimmy were really cute together. Tommy's smiles and shocked/confused faces really expressed a lot of his feelings in the series, which he really brought in. I hope to see more of the both of them. I find Zee's acting great. His emotional scenes were heartbreaking to watch. However, his facial expressions during mature scenes were honestly my favorite part of his acting lmao. That aside, he played the character of Fighter really well. The happiness he feels with Tutor, his feelings about his dad, and his love for Tutor and how he wants to live his life. Saint was my favorite here. Hands down, Tutor's struggles throughout the series, I really felt them. I cried with him when he comforted himself. The optimism he tries to present, his feelings for Fighter, the way he found his own happiness is also important, his struggle while working and trying to pay off their debt, really all were presented by Saint flawlessly. The other actors satisfactorily played their own roles.
Music:
I loved the music in Why R U. Some were catchy, some are more for the feels. The songs picked were great, I could listen to them a lot especially Mean's Why R U. The meanings of the songs were appropriate for the series as well.
Rewatch Value:
It is worth rewatching, especially if you didn't catch the side couples quite well like me. It also is worth rewatching to understand Zon's character more, (I had to write an essay to come up to a conclusion lol). And I think it would be fun to watch again to relive some of the plot points.
Other Opinions:
I'd like them to make more scenes about Zon and Saifah, to show their development and give Saifah depth as a character. The side characters too, and scenes like how Fighter reconciled with his dad and vice versa.
Overall:
It was great and worth watching, for both the feels and the emotional rollercoaster that is Tutor and Fighter. (and for jimmy my baby he's so CUTE)

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