The fact Riri remembers her past life is the world’s worst-kept secret because Zai clocked her relieved expression and probably realised she was pretending she didn’t remember sh*t.
Or maybe idk he thinks Riri is now a lolicon and doesn’t remember Ooma. He’s not that bright, poor guy. But if his braincells worked, he could be thinking both “She remembers Ooma” and “She’s a lolicon now”, tho.