
blacknerocat's comment below seems the most logical to me. except the tiny 'disgusting' bubble wasnt discussed (chapter 5 page 15). so i thought, maybe senpai was raped by the stalker? the hand in the panel is the stalker's hand harassing him (which senpai suddenly remembered). he mentioned that he only wanted to show his cool side, and felt ashamed for getting raped, so he chose to disappear. and then, the stalker found senpai again and caused the accident.

Same. I had the same thought.

someone should make other yaoi versions too. yaoi and the beast. yaoirella. sleeping yaoi. yaoipunzel. yaoistiltskin. little red riding yaoi. the little yaoimaid. snow uke and the seven semes ლ(´ڡ`ლ)

I would love to see Seme White and the Seven Ukes. Let's see if he can handle 'em. ;)
It will be a plot/trope twist, which the scanlated yaoi scene sorely needs at the moment.
Except for Scarlet Beriko, I don't think there's a lot of pretty semes, or aggressive ukes.... Would love to see Cinderella in Scarlet Beriko mode :) He makes the prince happily uke after. Sleeping prince used practically used as a dildo by a tsundere princess who slays dragons during his past time... Little Red Riding Hood who chases the wolf around because she absoutely loves wolf dick... etc.

Yaoipunzel, Red ridinghood yaoi, Yaoirella, and The little yaoimaid already exist tho

The little red riding hood, cinderella, the little mermaid, etc : http://www.mangago.zone/read-manga/ever_after/
The little mermaid : http://www.mangago.zone/read-manga/mermaid_and_the_magician/
Rapunzell (Trap, shota, mob) : https://myreadingmanga.info/katou-chakichi-inran-rapunzel-eng/
The little red riding hood (shota but the seme is good looking af) : https://myreadingmanga.info/akazukin-chan-harapeko-oukami-san-little-red-riding-hood-dj-eng/
And I forgot the other cinderella yaoi because it was kinda old af

Probably not what you're looking for (it's shonen ai not yaoi), but it's long, plotty, action packed and touching. The rapunzel story is the secondary couple
http://www.mangago.zone/read-manga/koori_no_mamono_no_monogatari/
The yaois (actually shotacons) on this site:
http://www.mangago.zone/read-manga/gensou_shounen_koimonogatari/ (BnB, Cinderella, Magic Tea Kettle, Boy who Cried Wolf, Aladin, Snowhite)
http://www.mangago.zone/read-manga/oujisama_no_kiss/ (Sleeping Beauty)

in addition:
Based on the seven goats fairytale: http://www.mangago.zone/read-manga/the_pretty_wolf_and_the_seven_goaty/
They say this one is Yaoi but jury's still out on the logistics of it:
a salaryman Thumbelina : http://www.mangago.zone/read-manga/yamada_kun_to_tanaka_kachou/
Not exactly Yaoi but by the incomparable Nakamura Asumiko sensei:
http://www.mangago.zone/read-manga/le_th_tre/ (story 2, twist on pinocchio)
http://www.mangago.zone/read-manga/le_th_tre_de_b/ (story 12, twist on pygmalion)
http://www.mangago.zone/read-manga/adolte_and_adarte/ (twist on Prince and Pauper)
if anyone wants to read a realistic manga abt mistreatment of animals (particularly dogs), read this http://www.mangago.zone/read-manga/deep_love_pao_no_monogatari/
u have to prepare a lot of tissues tho
I should've known I wouldn't be able to stop myself from reading that :,V So good but so bad for me. I'm totally not broken inside right now
I read the other girls story of that series and I aint gonna bawl my eyes out AGAIN
But one day I'll probably warp myself into reading it ;-;
i read both, but my fave is pao! a lot of issues are addressed in pao's version (not just animal abuse & prostitution). it's really good (and tragic ><)
I read this like last 5 years ago and i don't want to read again XD It was heartbroken me a lot and non-stopped cry.....