If I were to compare this to Titan's Bride.... This one is quite lack luster especially in terms of plot and the romance, they go through tropes and plot points so fast. I'm getting whiplash. The art and the smut is nice. But it got repetitive. Introducing possible 2nd ML (Diluc/Dolga), some conflict (kidnapping mostly), almost assult(Diluc)/romance(Dolga) that makes the ML Varuna jealous, they fuck(and it's the same song&dance), some big declaration of love and devotion from either Varuna or Rintaro.
I wish with the serialisation of the manga, the author could have taken the time to develop Varuna and Rinataro's emotional connection beyond being a fated pair and "sex is good". Especially on Rinataro's side.
The plot where he got taken back to his world was so disappointing. We could have gotten a bigger insight on who Rintaro is through friends and family, what makes him want/NEED to go back to Varuna's world, aside from "sex is good" and how much time has passed between the 2 worlds. I found it ridiculous they had to go to a shed at the back of the library to talk, just so the author can make them fuck in this world. Why couldn't we go back to Rintaro 's old home (if he still has it) or to make it kinky why not in an unused bathroom where there's a mirror....
The story could have been so much better or it just should have ended at ch7. the pacing then would've made so much more sense and less forced.