I tried my best but I'm not sure about like what age group or like shoujo/shounen/Josie/manhwa so I'll just recommend these:
-Yubisaki to Renren (they're in college but it's cute)
-Daybreaking Romance (is manhwa but the couple is super sweet)
-Kawaii nante kiitenai (is new but so far sweet)
-Love Your Enemies (manhwa but the couple is interesting not exactly what you're looking for but ML is cute!!)
-Futsuu no Koiko-chan (couple is so PURE)
-Tsuki no Oki ni Mesu mama (i just think it's funny)
-Koi Wazurai no Ellie (just check it out lol)
-Yamaguchi-kun wa warukunai (purest babies around)
-The Omniscient POV Of An Unrequited Love Webtoon (cute and the art is pretty)
-Heroine Hajimemashita
-Tsun-Ama na Kareshi (they're adults but so pure and sweet)
-Mikansei Demo Koi ga Ii (adorable sweet)
-Our Precious Conversations (art and cute characters)
-You Got Me, Sempai! (feels real but caution I heard the ending might not be that great)
-Hananoi-kun to Koi no Yamai
-Short Cake Cake (sweet also check out the mangaka other work)
I hope you find something on this you like! I think I have more recs so DM me if you need any:)
Does anyone have any suggestions for any other stories like this one? Thank you!