In the end, Dong Yunshan woke from a nap to find Yukino Yukinoshita wearing his clothes and making lunch.
"You said whether the gentle scratching method could put someone to sleep depended on how soft and warm the skin of the fingers was." Dong Yunshan recalled the answer he had come up with before falling asleep and tapped his temple with his fingers together. "But if it were only a matter of touch and temperature, those could easily be replicated with other objects. Yet Sister Jin still thinks I can't do it—so I think there's one more decisive factor beyond touch and temperature."
Yukino Yukinoshita had not expected Dong Yunshan to have seriously thought about the question. She pressed further, "Another factor?"
"That is... the feeling of a mother." Dong Yunshan ran a fingertip over his brow. "Comfortable touch and suitable warmth alone aren't enough. The key to gently scratching a baby to sleep is that the baby is familiar with that kind of touch."
Volume Three: Final Spring Break: Corrective Matters
At first, when Yukino Yukinoshita touched Dong Yunshan's waist, he felt very uncomfortable.
Especially when he was on guard.
Worried that she might tickle him, Dong Yunshan could never ignore her touch.
Even when she did not tickle him, he still felt uneasy.
Although Yukino Yukinoshita's hands were soft, that unease did not lessen because of it.
But after confirming that Yukino Yukinoshita had fallen asleep, and after some time spent getting used to and familiar with it, Dong Yunshan fell asleep right away.
He had long since grown accustomed to her touch.
Mother Jin's gentle scratching method was the same.
If the fingers were rough or the temperature unsuitable, it would certainly fail to put someone to sleep.
But even if the fingers were soft and the