Let's Die Together on the Same Day, My Lady

"It was love at first sight."
"Please go out with me!"
From the very first day of the academy's entrance ceremony, the Political Science department's new student—"Del"— became famous for his handsome face and his confession alike.
And the target of that confession became just as famous by association: third-year Technical Department student, "Arphina Tonide."
Arphina, who carries a secret no one else knows about, turns Del down.
But this gorgeous lunatic shows no sign of giving up.
"There isn't a single spot on you, from the crown of your head to the tips of your toes, that isn't pretty. How am I supposed to not like you? Is that even possible?"
"You really do remind me of some small animal, senior. A puppy, a rabbit, a baby lamb, a baby chick……"
"……Even if you'd already had someone, senior, I prayed I'd at least be someone worth competing with. No—actually, I hoped you'd never get confessed to by anyone but me, ever, for the rest of time!"
Arphina can't make sense of Del's unconditional devotion to her.
Seriously, what does he even see in me? What is there here to like?
Is he messing with me, maybe?
But then—
"Senior. We've met before."
We've met? Before?
"So just—stay right where you are, senior."
"From now on, it's my turn to try."
"Until my sincerity reaches you. And until you trust me completely, fully—that's when I'll deliver everything I feel for you!"