He didn't tell them, I wonder where you got that idea from????? Akihito said that he was in a shoot out on a ship and lead them to believe that the red of the tomatoes "reminded him of those agonising days..." e.g as Kou said, a bloodbath. That small scene is merely a fun introduction to the extra story. He doesn't go into any detail or tell them anything about Asami........especially not what sexy times goes on between them haha. Later on he says in another chapter that he hasn't even told takato and kou about the details of him living with Asami - so why would he talk about his sex life but not that??
Hence, my confusion (￣∇￣")
I just reread it after reading ur reply, definitely makes more sense now ٩(๑❛ᴗ❛๑)۶
I was pleasantly surprised …and a bit confused the first time I read chapter 31 (・o・)
I honestly didn't think Akihito would actually let Kou and Takato know about his relationship with Asami, much less what they do together after being missing for a while