They chapter shows the strange interaction between MAV/Souta and Kaoru, but left a lot unexplained. Kaoru is used to the cringey perv stalker Souta from the game, but he's been very respectful since the school year started. She's starting to look closer at him to see what has changed. The events of the class competition are too much for her to ignore. How did he win deepest floor/best gem, why is he skinny?!, Why is he not creeping on her like he used to? She's both curious and wary because he's clearly hiding something. Souta has an "inner piggy" who madly loves Kaoru, but Mav is suppressing it. He's torn between letting piggy out and revealing his secrets to Kaoru, and keeping the plot on line and letting her go. This contributes to their weird tension.
There's also an important detail from the LN the manga left out. Spoil at your own pleasure.
Souta was cleaning up before Kaoru showed up. Before his bath, he put the dungeon laundry out to dry. That includes Kano's dungeon equipment. Before Kaoru leaves she sees the mask Kano was wearing and puts together who their mysterious helper was. We can assume she's realizing Souta is hiding way more than a personality change.
With each chapter, this gets worse and worse. Like, you know there are at least three other reincarnators near you what kind of OG story are you talking about? The more complex the author tries to make the story, the more it falls apart.
Souta's strict desire to stick to the game's storyline is one of the more contentious parts of the story. On one hand, he believes that using the story is valuable foreknowledge for his (and his family's) survival. This is true to some extent. But on the other hand, the longer he and the other players exist in the world the more little changes start to add up. At some point story events will be different enough that his predictions won't be useful. Souta is like an unreliable narrator where his first-person POV is allowed to be
wrong. That kind of flawed MC adds tension, and invites us to scream "WHAT ARE YA DOING STUPID?"