If I analyze this situation logically, in real life, it would be unforgivable for someone in the main lead's position to fall in love with his sister-in-law. While there may not be anything inherently wrong with developing feelings, he should exercise self-control and avoid any inappropriate actions. However, when he takes advantage of a vulnerable moment by asking her to sleep with him, promising to forget everything the next day and start anew, it becomes difficult to sympathize with such a character. On the other hand, if I disregard logic and immerse myself in the story, this character garners significant sympathy throughout, appearing almost flawless in every aspect.