Shoujo manga or anime where a male lead is inlove with the female lead but when someone point it out, he gets all angry and embarrassed,like "thats not it" or "its not like I did it for you". And they get super cute when they are jealous.
Some like this are:
Kaichou wa Maid sama(its reverse though)
Yumiero patisserie (not exactly like the topic but kashino is just cute)
Kimi ga Kirai na Koi no Hanashi(Just love it)
Horimiya(Just love it)
Things I hate:
Harem(its not romantic when they have multiple lovers)
Age gap(Its Weird)
Same sex relationship (Not my thing)
Just wanna insert. If you've watch Charlotte, I like the confession part,LMAO, its unique but sweet too.