START-397: My Idol Koibuchi Momona is Too Sexy Massive Tits

START-397 Highlights: My Idol Koibuchi Momona is Too Sexy with Her Massive Tits

2025.11.18

Koibuchi Momona getting a titty fuck cumshot in START-397

START-397 is the live-action adaptation of the doujin manga “My Idol is Too Sexy, It’s A Problem”. It stars Koibuchi Momona as a Japanese idol who has an affair with her manager. There are 4 scenes with Scene 1 and 2 having a titfuck cumshot.

Scene 1 – Titty Fuck + Sex (1 TF Cum)
Scene 2 – Titty Fuck + Sex (1 TF Cum)

Summary
Actress Information

Movie Details

START-397 movie cover featuring Koibuchi Momona

Movie Name	完全新作書き下ろし実写化！「ウチの担当アイドルがエロすぎて困る」【AV×漫画×オリジナル楽曲】史上初！？トリプルコラボ解禁！！！ START-397 A Completely New Live-action Adaptation! “My Idol Is Too Sexy, It’s A Problem” [AV X Manga X Original Song] A First in History!? Triple Collaboration Unveiled!!!
Studio	SODSTAR (SOFT ON DEMAND)
Release Date	4th November 2025
Pinching Finish (挟射回数)	2 Titfuck Cumshots (2 パイズリ挟射)

Movie Highlights

Scene 1 – Titty Fuck + Sex (1 TF Cum)

Scene 1 has the manager accidentally walking in on a naked Momona in her dressing room. After some shenanigans he finally gave in and starts sucking her tits, which she reciprocates by giving him a blowjob and a titty fuck to completion. After that, he gets to fuck her pussy for a 2^nd jerkoff cumshot on her ass and back. The paizuri was decent at about 5 minutes long with Momona-chan being topless, and the cumshot was OK with 1 good spurt above her chest. Though I would have preferred a top-down POV angle instead.

Performance (演技)
Eroticism (エロ度)
Pinching Technique (挟むテク)
Finish (射精度)
Average

Link #1 Link #2 Link #3 Link #4 Link #5

Scene 2 – Titty Fuck + Sex (1 TF Cum)

Koibuchi Momona giving a titty fuck while laying down

Scene 2 takes place in a hotel room where the manager gets to enjoy a private “performance” from Momona. She gives him a brief handjob, and then another blowjob and titty fuck to completion but this time in the straddling position. After that they have intercourse until he cums in a condom inside her. Momona-chan kept her idol outfit on for the scene, which I would prefer she not. The titfuck cumshot was also weaker in this one, despite them using fake cum for it.

Koibuchi Momona getting a titfuck cumshot

Performance (演技)
Eroticism (エロ度)
Pinching Technique (挟むテク)
Finish (射精度)
Average

Link #1 Link #2 Link #3 Link #4 Link #5

Summary

Overall a serviceable movie for fans of Momona-chan, with Scene 1 being the jerkable for paizuri maniacs. Scene 3 was also quite decent with her being fully naked and getting a creampie, though that one sadly didn’t have any titty fucking.

Overall Enjoyment

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Actress Information

Portrait photo of Koibuchi Momona from STARS-740 — Image courtesy/copyright of SOFT ON DEMAND

Actress Name	恋渕ももな (Koibuchi Momona)
Date of Birth	14th June 2000
B-W-H (Cup Size)	110cm-65cm-92cm (O)
Related Tags	Japanese, Curvy (豊満), Massive Tits (超乳), Natural Tits, Big Ass (巨尻)