Also done that lol. Doesn't work so much when I take a girl home. I usually have to take a nap between shots, which is great don't get me wrong, but I would much rather not feel so old.
I had 2 weeks worth during my Ginza visit last week & much prefer hanging on during the hour. It always makes for the best fucken explosive finish which I think Kirara appreciated!! 👍🏼
I had a similar problem to you and I'm also in my 30's
I have slightly improved being able to shoot from once per day to twice per day.
Used to have to wait for next day until I had any feel to harden.
Changed my diet, did some walking on the treadmill and tried to sleep more.
Worked to an extent.
It can be annoying when u try to control yourself from exploding and fail miserably. You went for second round and was unable to do so and the end of the session. You can try praticing at home to strengthen your pelvic muscles . There are couple of exercise you can do if u do a search online. Or u take a longer break through foreplay.