Jealous Outburst? Two Lovebirds on a Boat: Tremble (E21)

Keitaro was ranked "B" level in a practice test for acceptability of Tokyo University. To thank Naru for teaching him study, he asks her to go out for a dinner. She is delighted, but Mitsune advises her, "Beware. All men are wolves". After dinner, they take a walk in the park and Keitaro gets serious. He says that he has something to tell her and start walking towards the hotel area. (Prime Video)