Is it not possible to love a younger man...?

Is it impossible to love a younger man...?

I'm 18 years old, facing the most important time of my life...
Dating isn't important to me right now.
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Yoon Yeo-ju/18 years old
"I'm not interested in dating right now..."
He goes around saying that he is the best in the school and tries not to give up the top spot.
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Woozi (male lead) / 17 years old
"Senior... no... Noona! Come out with me."
As soon as he entered high school from his troubled middle school, Woo-ji fell in love with Yeo-ju. He is always trying hard to approach Yeo-ju and win her heart.
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Im Soo-jung/17 years old
"Oh my...senior...heh...Woojin, please give it to me."
As soon as she entered high school, Soo-jeong was rumored to be a fox.
I fell in love with Woozi when I saw him...
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Vernon/18 years old
"Hey...! What are you?"
I always say scary things, but the heroine's one and only younger brother...
(It's only a 2 minute difference...!) But he tries to protect the female lead.
(He looks at Woozi cutely and always pats his head when they meet.)
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Indeed... these people... will they be able to get along...?