this manga is a sequel to ijiwaru shinai de ( http://www.mangago.zone/read-manga/ijiwaru_shinai_de/) the first 3 stories are just a compilation of one-shots. chapter 4 and 5 is the main story.
seme & uke are childhood friends, with 3 years age gap. they were close, but grew distant as they get older bcs seme noticed his feelings for uke. uke clueless. they started to talk again after seme moved out of his parents' house. one night seme got drunk, kissed & confessed to uke (plus, they were kinda talking abt love life). the next morning, seme told uke to forget abt it, but uke couldnt. & lately been thinking abt seme (it's typical yaoi plot) so he confessed, but seme rejected him bcs seme thought that uke was just confused with his feelings (again, typical yaoi plot). uke got fever from thinking too much, seme nurse him, uke kissed seme, bla bla bla & they started dating! simple, cute story with little conflict.
'like a sugar' is a main story of this one (kinda like a prequel, i guess), it's abt the senpai (shima) x sousuke couple as the first story. 2nd story is abt taguchi x morisaki, who are the main characters of 'bitter like light'. & the 3rd story is abt sousuke's brother, shouta x sensei couple.
nagakawa (the first guy introduced in 'bitter like light') is just another extra supporting character, i guess. and he's first introduced in his manga (so we dont have stories abt him in sensei's previous works, but let's hope there's one in future). bcs this manga is supposed to be a spin-off of another manga, it's to be expected that most of the readers alr know that this manga is abt taguchi x morisaki couple.
idk if anyone will get what im saying but uhh im just tryna help ksksks
YES THIS MANGA CONTAINS RAPE. IF U DONT LIKE IT, DONT READ IT, AT ALL. DONT GO READ IT AND THEN COMPLAINS BCS EXCUSE ME UVE BEEN WARNED.
STOP SPOILING THE FUN FOR PPL WHO ACTUALLY ENJOYED THIS MANGA.
SPOILER AHEAD:
the uke is dumb lol he believes everything his sister said, blindly. but he cute. honor student. seme is a jerk. he loves sex. i'd say he's an ikemen (+ the arts pretty) & he got no problem attracting girls but somehow the uke feels better than those girls, he said. the seme is free-spirited but he got attached to the uke. i love the chara development. from meeting up just for sex, seme also invites uke to his house bcs he just wanna be around him, he enjoys being around him even w/o sex. both develop feelings hehehe yep! overall, everything's good!!