Is this referencing a specific youkai? One that makes people faint when it becomes happy?
People or animals with weird conditions, physical or mental, are a source of a lot of myths. Or even, for example, jackalopes are just rabbits with tumors.
https://en.m.wikipedia.org/wiki/Japanese_wordplay
su seems to come from surii; that is, from transliterating English "three" as surii, and then shortened to just su.
wah hah hah
if you laugh you'll get an awesome grade
wah hah hah
if you laugh you'll get an awesome grade
wah hah hah
if you laugh you'll get an awesome grade
wah hah hah
if you laugh you'll get an awesome grade
wah hah hah
if you laugh you'll get an awesome grade
wah hah hah
if you laugh you'll...
I personally feel like it's often a weird balance of having to genuinely care about the romance and gender drama and not take seriously these kinds of episodes or the annoying side characters. They often clash.
I think a good manga to compare it to would be Adesugata Junjou Boy (by the same...