Can't believe they didnt adapt this part during the conversation with the dad. Not really a spoiler, just cut content, but ill put the warning just incase :
Isuzu looks up, smiles brightly, and kisses me on the mouth…
And then, she says,
“Yup! Thank you! Isuzu… loooooves Onii-chan!”
Y-Yeah… something still feels a bit off, but… oh well!