You had a crush, you found out your crush already in relationship, WTF you're going to do about it? Normal people probably just go on with their lives, waiting for a chance that probably will come someday, but not for Kimura Ai, she's going to sabotage it.

Kimura Ai, a young, brave, egocentric, and aggressive girl; I believe that after learning that her crush, Tatoe, had a girlfriend, she became obsessed with this thing she thought of as love, allowing her feelings to control her and turning her into a "very" irresponsible person to those around her and even to herself.
The way Ai tries to sabotage Tatoe's relationship with his girlfriend, Miyuki, is by approaching and befriending her.

"Thank you for teaching me how it feels like to be touched. If only you could be patient with me, even if it's out of self-regard, even for a split second. If that means you're opening your heart to me... I'll cherish that moment forever."

I love this film for how it made me feel, how compelling the story was, how beautiful the visuals are, how great the actors' performances are, etc. and this film kinda reminds me of The Half of It, this GL thing that gave me butterflies, even though in here would be realize late but the moment Ai and Miyuki is there and very intimate.

Anna Yamada's performance was very good, her expression, and how she showed Kimura Ai's desperation to be loved was so good, and why the hell she could be this kawaii, if I'm Tatoe, this film could be over in 30 minutes, because if she confessed her feelings, I'd accept them right away, and I'd be a simp for my queen, Yamada-sama 4eva.
Like the others, I also want to mention Haruka Imoe; she's really did a great job. She and Anna always have that intimate scene, and she as Miyuki, can keep up with Ai's aggression, resulting in the most beautiful kiss and sex scenes in Japanese films I've watched.

I think that's all I wanted to type. Thanks.