Isuzu Ren Private Clothes Story - Reason for Hesitation

[We see Ren’s diary]
Ren: *Date: X.Y School was closed today, and by chance I met Rika-chan on the streets*
[We see the middle of the city]
“... Ah...”
Rika: “Hah...? Ren-chan!?”
“To meet you here, what a coincidence!”
“It’s like some destined meeting, ye!!”
Ren: “Eh... Um, that’s”
Rika: “Ahaha, it’s a joke, a jooke!”
“You’re not using your uniform today, did you change at home?”
Ren: “Ah... It’s...”
Rika: “... Hm, what?”
“Is there some special reason for why you use those clothes?”
Thunk
Rika: “--!?”
Ren: “... Eh...?”
Rika: “.......................”
Ren: (... So quiet all the sudden, what happened...?)
“Ah... Ehm, these clothes... It’s because we... Didn’t have school today...”
“... The university was using our classrooms to... Hold entrance examinations”
Rika: “R-... Right...”
“Ah.... Because your school’s affiliated with the university, right”
Ren: “Y-... Ye...”
Rika: “So lucky. We had a normal school day”
“..........”
Ren: (Rika-chan is... Different from usual?)
“... Eh... Ehm, are you out shopping...?”
“Ye, the usual cheap brand cosmetics... You?”
“Ah... I’m headed to the bookshops...”
“To buy the new book... By one of the writers I like...”
Rika: “I see...”
“.........”
“The thing is... Ren-chan”
Ren: “Eh... What?”
Rika: “Those clothes...”
Ren: “These... clothes...?”
Rika: “E- Ehm... Are very cute!”
Ren: “Y-... Yea... T-Thank you”
(There’s really... Something weird...?)
(It shouldn’t be the first time... I’ve worn this... When we’ve been together...)
“Rika-chan”
Rika: “Eh... Ae... What?”
Ren: “Did I... Say something... wrong...?”
Rika: “T-That’s not it at all! You haven’t done anything wrong!”
“It’s just... It’s really hard to say it when you have to...”
“........”
“... Ren-chan”
Ren: “Y-... Yes!”
Rika: stare
Ren: (W- What an intense look...!)
Rika: “Ye... Without a doubt, there’s no way I’m wrong”
“... I’m sorry I didn’t tell you before”
“Ren-chan, I’m pretty sure”
Ren: “Y-........... Yes?”
Rika: “That collar is inside out”
Ren: “... Hah?”
“Ah...”
“AaAaAA!!”
Rika: “Because I think... This is one of those removable ones right?”
Ren: “Ye... I just got it back from... The cleaner”
“When I was leaving home today... I think I... Attached it the wrong way”
“... So embarrassing...”
Rika: “We can find a bathroom and fix it there. There’s a 1090 over there!”
Ren: “Thank you, Rika-chan... You’re really considerate”
Rika: “I- I wonder?”
Ren: “You didn’t want to hurt me... And that’s why you didn’t want to say anything, isn’t that right...?”
Rika: “If you say so”
“Ye, Rika-chan’s super considerate for not pointing it out the second she saw it!”
Ren: “Fu... Fufu...”
*That’s right, Rika-chan is very considerate*
Emiri: “Ooo, what a coincidence!! Rika-ppe, Ren-pasu!!!”
Rika: “Oh, Emirin!”
“Mh... Mmmm?”
Emiri: “What is it?”
Rika: “Emirin, those sleeves... Your shirt’s inside out?”
Ren: *Rika-chan is very considerate... (?)*