genuinely, people are out here making such cliche romantic, "angelic" gestures in their characters that are just so boring and obvious fanservice with no purpose into the plot and their character study/arc. instead of leaning to the wall seductively and smirking smugly yet attractively, here are some ways to actually add something of substance rather than just a cheesy and cringe romcom.
Character A can have an ethical dilemma of their lust over Love Interest and how, through trial and error, decided to do, or accidentally did for Plot Twist to happen. This not only gives the audience what they want, but also show Character A's logical thinking, personal ideals, ideology and speech patterns.
Make Character A do their average daily routine but way more sloppily, even the things they are expert at seem to be at beginners level because of their unbearable growing infactuation for Love Interest, making them question everything. This helps to show the impact of the relationship and show what Character A's standards, their way of procedures are, and how they panic and how they deal, or not deal, with said dreadful realization.
Yes, there can be a horny scene, but I recommend adding some sort of long-term consequence, with first-party's or third-party's, appearances, reputation, imagery, and so on. They have sex, cool, but what about the morning after? What about next month? Do they dwell on it and have blue balls forevermore? Or do they just move on, yet still subconsiously viewing the other slightly off?
How do they show signs of affection, or not show signs of affection? Put them into situations where they have to interact. They can be more considerate, be more bastardous, be more depressed, can give the one they desire a cup of tea sweetly to seduce them or splash it into the other's face. This gives you a sweet opportunity to give an analysis of their reactive behavior in newly changed social dynamics. Not only that, this can also let you study other relationships in Character A's life, since Love Interest can obviously affect more than directly.
anyways, if necessary, i may or may not add on to the list, but PLEASE, for the love of GOD, make them more than just hookup culture and bloom them into something! destructive or healing, just make them something more is enough.
