I'm Banging My Rival in a Parallel World!?

Volume 1 1-2. Isekai ni Tondara Rival ni Hameraretemashita!? (I'm Banging My Rival in a Parallel World!?) 3. Voice Complex (Voice Fetish) 4. Shinyuu no Tachiichi (Best Friend Zoned) 5. Momasete Marshmallow Honey (Let Me Squeeze You, Marshmallow Man!) 6. Isekai no Ore ga Rival deshita!? (I'm Jealous of Parallel World Me!?) Volume 2 1. Isekai kara Modotta Koibito ga Mata Betsu no Sekai ni Tonjaimashita!? (My Lover Who Returned from a Parallel World Travelled There Again!?) 2. Isekai ni Tobanai You ni Shita kedo Gaman Dekimasen deshita!? (I Don't Want My Lover Going to a Parallel World, but Can I Resist the Temptation!?) 3. Isekai ni Tondara Hanayome Kouho ni Nattemashita!? (Some Dude in a Parallel World Wants My Lover for His Bride!?) 4. Isekai ni Tondara Futari no Koibito ni Hasamaremashita!? (We Eavesdropped on Ourselves in a Parallel World!?) 5-7. Momasete Marshmallow Honey (Let Me Squeeze You, Marshmallow Sweetheart!) 8. Isekai ni Tondara tte Majime ni Hanashiteta kedo Ichatsuita dake deshita (We Tried to Have a Serious Talk About Parallel Worlds, but Ended Up Banging Instead)