Vol 3 ch 2
I would read 10 volumes of this
Also I empathized with Seiya and his low sex drive so much, and appreciated how the seme accepted it.
Vol 3 FUCK this man. "I'm his father I'm gonna take him away" yeah and fuck you too
Vol 2 is definitely the best so far in terms of low sex drive respect. It hasn't necessarily gone up so much as they do have sex more often now (inferred in vol 3)
Vol 1 iffy on the start of the relationship but love the child Tenma-Kiriyuu relationship
Komochi Host no Kiken na Rinjin