Is this canon or not? This is how training at the Blade works

Douma x Shinobu - Fanservice on the Verge ("The Blade that Splits Demons")

"Ducky, keep sucking!" - he wants to cum in his mouth again

Rooftop meditation is fucked up - but there's cum on her face

Fucked Nezuko in the woods and didn't have time to pull out - now he's got semen in her

Sensual Sex Scene with Shinobu ("The Demon-Splitting Blade")