OP, what is the exact timeframe of your 24hr layover?
If you're arriving early, as in morning, it may work out well for you to do the love hotel then check into the normal hotel for the night.
You should familiarize yourself with the concept of rest (kyukei), free time or service time, and stay.
It's not impossible to go out during your love hotel stay, but it's certainly not convenient for that and plus you'll need to be able to talk to someone in order to do that (that someone will likely not speak English). So a normal hotel would be a better option for much of the time that you'll have in Tokyo.
If you're really keen to check out a love hotel, I think it might be worthwhile.
There're so many different types of rooms out there including some that are quite frankly not much different than a business hotel room, and every place operates differently in terms of how to pay, rates/plans, hours of service time, whether service time is even available, etc. There are guidebooks in Japanese with pictures and all kinds of info, and those are really the best sources of info. You don't have that. Plus, if you have luggage, you'll have to do something about that. You probably want a really cool room, whereas a typical Japanese couple won't care as much and just needs something that's available at a reasonable rate. So I think you might need to end up doing a lot of research and planning and, in the end, you might find it's not really worth it.