IF indeed death takes place according to last panel on Page 20, it's probably "Death By Snu-Snu" ... unless male protagonist is kept alive to come back tomorrow (the lucky bastard).
Eight hours, eh? Looks like hypnotism turns Yuuichi into the H-equivalent of the Energizer Rabbit; he keeps going and going and going ... or perhaps rather that should be: he keeps cumming and cumming and cumming ... (the lucky bastard).
Final destruction of the human race is averted, so-to-say, by "the power of the penis", and the so-called sexual examination units, on reading the data from "01" found it impossible to resist .....
All Together Now (with feeling): "Well Isn't That Cute, ... BUT IT'S RIGHT!!!!!"
Trusting that the male protagonist survives, declares he'll "take responsibility", meets the parents, Hinano's happily in love, he gets her mother's approval (which in turn calms the father down) ... all the good stuff.
IIRC, that one (couple have sex inside mascot costume) goes by the name: "Kigurumix". And it had a great ending also (girl regards guy as her future spouse).
Unless the next installment has a suitable "IT'S PAYBACK TIME" moment, this is the point when I (figuratively speaking) "wash my hands" of following this series. And That's The Bottom Line, 'cause MHM-Dono Sez So.