[Okay, that really concerns him, because Ian is rarely so serious. Ian is never this serious. He can't remember Ian ever talking to him like this. For a few moments, Souji studies Ian's face, trying to figure out what it is that Ian's not telling him yet.]
Yesterday, my mother tried to take me away from my father. I saw a man running around in a black cloak and mask who tried to kidnap my father. ... I perfected Torin's technique.
[He figures that's enough information to give Ian a good understanding of what day it had been. And, after letting Ian have a moment to process that, Souji brings one hand up to hold Ian's wrist.]