shinji_

Asagao wa Yoru kara Saku

It's a manga that has 5 chapters

https://www.mangago.me/read-manga/kotaete_my_drifter/

here is a list of some angsty shyt (but some are good and some are really bad so good luck in your gambling) :
Pearl boy : ignite the dawn
Toxin
Love murder basketball
Red mansion
Kiss me liar
Into the rose garden
Steel under silk
Dreaming of the dokkaebi
Backlight
The heart of the lotus
Projection
Die in my arms
ENNEAD
The boundary of delusion

add Missing love to the list

My list has a ton of good ones
https://www.mangago.me/home/mangalist/3348103/

https://www.mangago.me/read-manga/mihanada_pectolite/

i haven't read checkmate yet, but i think they're academic rivals. maybe you've already read it tho lolol.

https://www.mangago.me/read-manga/ao_to_midori/

The rivalry isn’t super strong

https://www.mangago.me/read-manga/secret_therapy/
https://www.mangago.me/read-manga/there_s_something_wrong_with_my_popularity/
https://www.mangago.me/read-manga/every_day_i_want_to_be_number_1/
https://www.mangago.me/read-manga/hanakoi_tsurane/
https://www.mangago.me/read-manga/mihanada_pectolite/
https://www.mangago.me/read-manga/outsider_communication/
https://www.mangago.me/read-manga/hidamari_no_orange/
https://www.mangago.me/read-manga/we_re_still_in_the_spring_of_life/
https://www.mangago.me/read-manga/fake_fact_lips/
https://www.mangago.me/read-manga/the_little_prince_1/
https://www.mangago.me/read-manga/tategami_ni_airabuyuu/
https://www.mangago.me/read-manga/who_s_going_to_win_this_competition/
https://www.mangago.me/read-manga/ore_no_kirai_na_senpai/
https://www.mangago.me/read-manga/contradict/
https://www.mangago.me/read-manga/pittosporum/